v1.16.0 — May 2, 2026

This release adds support for the QUERY HTTP method and a new ECONNREFUSED error constant, lands a substantial wave of HTTP, fetch, and XHR adapter bug fixes around redirects, aborts, headers, and timeouts, and welcomes 23 new contributors.

⚠️ Notable Changes

A handful of fixes in this release are either security-adjacent or change observable behaviour. Please review before upgrading:

• Fetch adapter now enforces maxBodyLength and maxContentLength. These limits were silently ignored on the fetch adapter prior to 1.16.0 — anyone relying on them as a safety net (DoS protection, accidental large uploads) had no protection. (#10795)
• Proxy requests now preserve user-supplied Host headers. Previously, the proxy path could overwrite a custom Host. Virtual-host-style routing through a proxy will now behave correctly. (#10822)
• Basic auth credentials embedded in URLs are now URL-decoded. If you have percent-encoded credentials in a URL (e.g. https://user:p%40ss@host), the decoded value is what now goes on the wire. (#10825)
• parseProtocol now strictly requires a colon in the protocol separator. Strings that loosely parsed as protocols before may no longer match. (#10729)
• Deprecated unescape() replaced with modern UTF-8 encoding. Non-ASCII URL handling is now spec-correct; consumers depending on legacy unescape() quirks may see different output bytes. (#7378)
• transformRequest input typing change was reverted. The typing change introduced in #10745 was reverted in #10810 after follow-up review — net behavior is unchanged from 1.15.2. (#10745, #10810)

🚀 New Features

• QUERY HTTP Method: Added support for the QUERY HTTP method across adapters and type definitions. (#10802)
• ECONNREFUSED Error Constant: Exposed ECONNREFUSED as a constant on AxiosError so callers can match connection-refused failures without comparing string literals (closes #6485). (#10680)
• Encode Helper Export: Exported the internal encode helper from buildURL so userland param serializers can reuse the same encoding logic that axios uses internally. (#6897)

🐛 Bug Fixes

• HTTP Adapter — Redirects & Headers: Cleared stale headers when a redirect targets a no-proxy host, fixed the redirect listener chain so listeners no longer stack across hops, restored the missing requestDetails argument on beforeRedirect, preserved user-supplied Host headers when forwarding through a proxy, and properly URL-decoded basic auth credentials. (#10794, #10800, #6241, #10822, #10825)
• HTTP Adapter — Streams & Timeouts: Preserved the partial response object on AxiosError when a stream is aborted after headers arrive, honoured the timeout option during the connect phase when redirects are disabled, and resolved an unsettled-promise hang when an aborted request was combined with compression and maxRedirects: 0. (#10708, #10819, #7149)
• Fetch Adapter: Enforced maxBodyLength / maxContentLength in the fetch adapter, set the User-Agent header to match the HTTP adapter, preserved the original abort reason instead of replacing it with a generic error, and deferred global access so importing the module no longer throws a TypeError in restricted environments. (#10795, #10772, #10806, #7260)
• XHR Adapter: Unsubscribed the cancelToken and AbortSignal listeners on the error, timeout, and abort code paths to prevent leaked subscriptions. (#10787)
• Error Handling: Attached the parsed response to AxiosError when JSON.parse fails inside dispatchRequest, prevented settle from emitting undefined error codes, and tightened the parseProtocol regex to require a colon in the protocol separator. (#10724, #7276, #10729)
• Types & Exports: Aligned the CommonJS CancelToken typings with the ESM build, fixed a compiler error caused by RawAxiosHeaders, and re-exported create from the package index. (#7414, #6389, #6460)
• UTF-8 Encoding: Replaced the deprecated unescape() call with a modern UTF-8 encoding implementation. (#7378)
• Misc Cleanup: Resolved a batch of small inconsistencies and gadget-level issues across the codebase. (#10833)

🔧 Maintenance & Chores

• Refactor — ES6 Modernisation: Modernised the utils module and XHR adapter to use ES6 features, and tidied the multipart boundary error message. (#10588, #7419)
• Tests: Hardened the HTTP test server lifecycle to fix flaky FormData EPIPE failures, fixed Win32 platform support for the pipe tests, and corrected an incorrect test assumption. (#10820, #10791, #10796)
• Docs: Documented paramsSerializer.encode for strict RFC 3986 query encoding, updated the parseReviver TypeScript definitions and configuration docs for ES2023, added timeout guidance to the README's first async example, and expanded notes around the recent type changes. (#10821, #10782, #10759, #10804)
• Reverted: Reverted the transformRequest input typing change from #10745 after follow-up review. (#10745, #10810)
• Dependencies: Bumped actions/setup-node, the github-actions group, and postcss (in /docs) to their latest versions. (#10785, #10813, #10814)
• Release: Updated changelog and packages, and prepared the 1.16.0 release. (#10790, #10834)

🌟 New Contributors

We are thrilled to welcome our new contributors. Thank you for helping improve axios:

• @singhankit001 (#10588)
• @cuiweixie (#7419)
• @iruizsalinas (#10787)
• @MarcosNocetti (#10680)
• @deepview-autofix (#10729)
• @atharvasingh7007 (#10745)
• @OfekDanny (#10772)
• @mnahkies (#7414)
• @tboyila (#10759)
• @Kingo64 (#6897)
• @ramram1048 (#6389)
• @FLNacif (#6460)
• @zozo123 (#10806)
• @pierluigilenoci (#10802)
• @afurm (#10708)
• @karan-lrn (#7378)
• @ebeigarts (#7149)
• @Raymondo97 (#10782)
• @mixelburg (#10821)
• @ashishkr96 (#10822)
• @cyphercodes (#10819)
• @Jye10032 (#7260)
• @VeerShah41 (#7276)

Full Changelog

This release delivers prototype-pollution hardening for the Node HTTP adapter, adds an opt-in allowedSocketPaths allowlist to mitigate SSRF via Unix domain sockets, fixes a keep-alive socket memory leak, and ships supply-chain hardening across CI and security docs.

🔒 Security Fixes

• Prototype Pollution Hardening (HTTP Adapter): Hardened the Node HTTP adapter and resolveConfig/mergeConfig/validator paths to read only own properties and use null-prototype config objects, preventing polluted auth, baseURL, socketPath, beforeRedirect, and insecureHTTPParser from influencing requests. (#10779)
• SSRF via socketPath: Rejects non-string socketPath values and adds an opt-in allowedSocketPaths config option to restrict permitted Unix domain socket paths, returning AxiosError ERR_BAD_OPTION_VALUE on mismatch. (#10777)
• Supply-chain Hardening: Added .npmrc with ignore-scripts=true, lockfile lint CI, non-blocking reproducible build diff, scoped CODEOWNERS, expanded SECURITY.md/THREATMODEL.md with provenance verification (npm audit signatures), 60-day resolution policy, and maintainer incident-response runbook. (#10776)

🚀 New Features

• allowedSocketPaths Config Option: New request config option (and TypeScript types) to allowlist Unix domain socket paths used by the Node http adapter; backwards compatible when unset. (#10777)

🐛 Bug Fixes

• Keep-alive Socket Memory Leak: Installs a single per-socket error listener tracking the active request via kAxiosSocketListener/kAxiosCurrentReq, eliminating per-request listener accumulation, MaxListenersExceededWarning, and linear heap growth under concurrent or long-running keep-alive workloads (fixes #10780). (#10788)

🔧 Maintenance & Chores

• Changelog: Updated CHANGELOG.md with v1.15.1 release notes. (#10781)

Full Changelog

This release ships a coordinated set of security hardening fixes across headers, body/redirect limits, multipart handling, and XSRF/prototype-pollution vectors, alongside a broad sweep of bug fixes, test migrations, and threat-model documentation updates.

🔒 Security Fixes

• Header Injection Hardening: Tightened validation and sanitisation across request header construction to close the header-injection attack surface. (#10749)
• CRLF Stripping in Multipart Headers: Correctly strips CR/LF from multipart header values to prevent injection via field names and filenames. (#10758)
• Prototype Pollution / Auth Bypass: Replaced unsafe in checks with hasOwnProperty to prevent authentication bypass via prototype pollution on config objects, with additional regression tests. (#10761, #10760)
• withXSRFToken Truthy Bypass: Short-circuits on any truthy non-boolean value, so an ambiguous config no longer silently leaks the XSRF token cross-origin. (#10762)
• maxBodyLength With Zero Redirects: Enforces maxBodyLength even when maxRedirects is set to 0, closing a bypass path for oversized request bodies. (#10753)
• Streamed Response maxContentLength Bypass: Applies maxContentLength to streamed responses that previously bypassed the cap. (#10754)
• Follow-up CVE Completion: Completes an earlier incomplete CVE fix to fully close the regression window. (#10755)

🚀 New Features

• AI-Based Docs Translations: Initial scaffold for AI-assisted translations of the documentation site. (#10705)
• Location Request Header Type: Adds Location to CommonRequestHeadersList for accurate typing of redirect-aware requests. (#7528)

🐛 Bug Fixes

• FormData Handling: Removes Content-Type when no boundary is present on FormData fetch requests, supports multi-select fields, cancels request.body instead of the source stream on fetch abort, and fixes a recursion bug in form-data serialisation. (#7314, #10676, #10702, #10726)
• HTTP Adapter: Handles socket-only request errors without leaking keep-alive listeners. (#10576)
• Progress Events: Clamps loaded to total for computable upload/download progress events. (#7458)
• Types: Aligns runWhen type with the runtime behaviour in InterceptorManager and makes response header keys case-insensitive. (#7529, #10677)
• buildFullPath: Uses strict equality in the base/relative URL check. (#7252)
• AxiosURLSearchParams Regex: Improves the regex used for param serialisation to avoid edge-case mismatches. (#10736)
• Resilient Value Parsing: Parses out header/config values instead of throwing on malformed input. (#10687)
• Docs Artefact Cleanup: Removes the docs content that was incorrectly committed. (#10727)

🔧 Maintenance & Chores

• Threat Model & Security Docs: Ongoing refinement of THREATMODEL.md, including Hopper security update, TLS and tag-replay wording, mitigation descriptions, decompression-bomb guidance, and further cleanup. (#10672, #10715, #10718, #10722, #10763, #10765)
• Test Coverage & Migration: Expanded shouldBypassProxy coverage for wildcard/IPv6/edge cases, documented and tested AxiosError.status, and migrated progressEventReducer tests to Vitest. (#10723, #10725, #10741)
• Type Refactor: Uses TypeScript utility types to deduplicate literal unions. (#7520)
• Repo & CI: Adds CODEOWNERS, switches v1.x releases to an ephemeral release branch, and removes orphaned Bower support. (#10739, #10738, #10746)
• Changelog Backfill: Added missing version entries to the changelog. (#10704)
• Dependencies: Bumped follow-redirects (1.15.11 → 1.16.0) in root and docs, axios (1.14.0 → 1.15.0) in docs, and a group of 5 development dependencies. (#10717, #10716, #10684, #10709)

🌟 New Contributors

We are thrilled to welcome our new contributors. Thank you for helping improve axios:

• @curiouscoder-cmd (#7252)
• @tryonelove (#7520)
• @darwin808 (#7314)
• @zoontek (#10702)
• @AKIB473 (#10725)

Full Changelog

This release backports a broad set of security hardenings from the v1 line — covering prototype-pollution defences, stream size enforcement, XSRF handling, URL null-byte encoding, and bounded FormData recursion — and drops committed dist/ artefacts along with Bower support.

⚠️ Breaking Changes & Deprecations

• Bower & Committed dist/ Removed: dist/ bundles are no longer committed to the repo, and bower.json plus the Grunt package2bower task have been removed. CI still builds bundles before publish, so npm/yarn/pnpm consumers are unaffected; installs via Bower or directly from the git tree must migrate to npm or a CDN. (#10747)

🔒 Security Fixes

• Prototype Pollution in Header Merge (GHSA-6chq-wfr3-2hj9): Tightened isFormData to reject plain/null-prototype objects and require append, and guarded the Node HTTP adapter so data.getHeaders() is only merged when it is not inherited from Object.prototype. Blocks injected headers via polluted getHeaders. (#10750)
• Prototype Pollution in Config Merging (GHSA-pf86-5x62-jrwf): mergeConfig, defaults resolution, and the HTTP adapter now uses own-property checks for transport, env, Blob, formSerializer, and transforms arrays, and merged configs are returned as null-prototype objects. Prevents hijacking of the request flow through polluted prototypes. (#10752)
• FormData / Params Recursion DoS: Added a configurable maxDepth (default 100, Infinity disables) to toFormData and params serialisation, throwing AxiosError with code ERR_FORM_DATA_DEPTH_EXCEEDED when exceeded. Circular-reference detection is preserved. (#10728)
• Null-Byte Injection in Query Strings: Removed the unsafe %00 → null-byte substitution from AxiosURLSearchParams.encode so %00 is preserved as-is. Other encoding behaviour (including %20 → +) unchanged. (#10737)
• Consolidated v1 Security Backport: Rolls up remaining v1 hardenings into v0.x: maxContentLength enforcement for responseType: 'stream' via a guarded transform with deferred piping, maxBodyLength enforcement for streamed uploads on native http/https with maxRedirects: 0, and stricter withXSRFToken handling so only own boolean true enables cross-origin XSRF headers. (#10764)

🔧 Maintenance & Chores

• CODEOWNERS: Added .github/CODEOWNERS with * @jasonsaayman to set a default reviewer for all paths. (#10740)

Full Changelog

This release backports security fixes from v1.x, hardens the CI/CD supply chain with OIDC publishing and zizmor scanning, resolves TypeScript typing issues in AxiosInstance, and fixes a performance regression in isEmptyObject().

🔒 Security Fixes

• Header Injection & Proxy Bypass: Backports v1 security hardening — sanitizes outgoing header values to strip invalid bytes, CRLF sequences, and boundary whitespace (including array values); adds proper NO_PROXY/no_proxy enforcement covering wildcards, explicit ports, loopback aliases (localhost, 127.0.0.1, ::1), bracketed IPv6, and trailing-dot hostnames. Proxy bypass is now checked before the proxy URL is parsed, and parsed.host is used for correct port and IPv6 handling. (#10688)

• CI Security: SHA-pins all actions and disables credential persistence in v0.x CI, introduces zizmor security scanning with SARIF upload to code scanning, adds an OIDC Trusted Publishing workflow with npm provenance attestations, and gates all publishes behind a required npm-publish GitHub Environment with configurable reviewer protections. (#10638, #10639, #10667)

🐛 Bug Fixes

• TypeScript — AxiosInstance Return Types: Fixes return types in AxiosInstance methods to correctly resolve to Promise<R> (matching AxiosPromise<T> semantics), and corrects the generic call signature so TypeScript properly enforces the response data type. TypeScript-only changes; no runtime impact. (#6253, #7328)

• Performance: Fixes a performance regression in isEmptyObject() that caused excessive computation when the argument was a large string. (#6484)

🔧 Maintenance & Chores

• Versioning & CI Workflow: Adds an automated versioning flow for v0.x, renames the CI workflow for consistency with the v1.x naming convention, and corrects the branch name reference in CI config. (#10690, #10691, #10692)

🌟 New Contributors

We are thrilled to welcome our new contributors. Thank you for helping improve axios:

• @nakataki17 (#6253)
• @gmasclet (#6484)
• @shaanmajid (#10638, #10639, #10667)
• @ivan-churakov (#7328)

Full Changelog

This release delivers two critical security patches, adds runtime support for Deno and Bun, and includes significant CI hardening, documentation improvements, and routine dependency updates.

⚠️ Important Changes

• Deprecation: url.parse() usage has been replaced to address Node.js deprecation warnings. If you are on a recent version of Node.js, this resolves console warnings you may have been seeing. (#10625)

🔒 Security Fixes

• Proxy Handling: Fixed a no_proxy hostname normalisation bypass that could lead to Server-Side Request Forgery (SSRF). (#10661)
• Header Injection: Fixed an unrestricted cloud metadata exfiltration vulnerability via a header injection chain. (#10660)

🚀 New Features

• Runtime Support: Added compatibility checks and documentation for Deno and Bun environments. (#10652, #10653)

🔧 Maintenance & Chores

• CI Security: Hardened workflow permissions to least privilege, added the zizmor security scanner, pinned action versions, and gated npm publishing with OIDC and environment protection. (#10618, #10619, #10627, #10637, #10666)
• Dependencies: Bumped serialize-javascript, handlebars, picomatch, vite, and denoland/setup-deno to latest versions. Added a 7-day Dependabot cooldown period. (#10574, #10572, #10568, #10663, #10664, #10665, #10669, #10670, #10616)
• Documentation: Unified docs, improved beforeRedirect credential leakage example, clarified withCredentials/withXSRFToken behaviour, HTTP/2 support notes, async/await timeout error handling, header case preservation, and various typo fixes. (#10649, #10624, #7452, #7471, #10654, #10644, #10589)
• Housekeeping: Removed stale files, regenerated lockfile, and updated sponsor scripts and blocks. (#10584, #10650, #10582, #10640, #10659, #10668)
• Tests: Added regression coverage for urlencoded Content-Type casing. (#10573)

🌟 New Contributors

We are thrilled to welcome our new contributors. Thank you for helping improve Axios:

• @raashish1601 (#10573)
• @Kilros0817 (#10625)
• @ashstrc (#10624)
• @Abhi3975 (#10589)
• @theamodhshetty (#7452)

This release focuses on compatibility fixes, adapter stability improvements, and test/tooling modernisation.

⚠️ Important Changes

• Breaking Changes: None identified in this release.
• Action Required: If you rely on env-based proxy behaviour or CJS resolution edge-cases, validate your integration after upgrade (notably proxy-from-env v2 alignment and main entry compatibility fix).

🚀 New Features

• Runtime Features: No new end-user features were introduced in this release.
• Test Coverage Expansion: Added broader smoke/module test coverage for CJS and ESM package usage. (#7510)

🐛 Bug Fixes

• Headers: Trim trailing CRLF in normalised header values. (#7456)
• HTTP/2: Close detached HTTP/2 sessions on timeout to avoid lingering sessions. (#7457)
• Fetch Adapter: Cancel ReadableStream created during request-stream capability probing to prevent async resource leaks. (#7515)
• Proxy Handling: Fixed env proxy behavior with proxy-from-env v2 usage. (#7499)
• CommonJS Compatibility: Fixed package main entry regression affecting CJS consumers. (#7532)

🔧 Maintenance & Chores

• Security/Dependencies: Updated formidable and refreshed package set to newer versions. (#7533, #10556)
• Tooling: Continued migration to Vitest and modernised CI/test harnesses. (#7484, #7489, #7498)
• Build/Lint Stack: Rollup, ESLint, TypeScript, and related dev-dependency updates. (#7508, #7509, #7522)
• Documentation: Clarified JSON parsing and adapter-related docs/comments. (#7398, #7460, #7478)

🌟 New Contributors

We are thrilled to welcome our new contributors. Thank you for helping improve Axios:

• @aviu16 (#7456)
• @NETIZEN-11 (#7460)
• @fedotov (#7457)
• @nthbotast (#7478)
• @veeceey (#7398)
• @penkzhou (#7515)

Full Changelog: v1.13.6...v1.14.0

This release focuses on platform compatibility, error handling improvements, and code quality maintenance.

⚠️ Important Changes

• Breaking Changes: None identified in this release.
• Action Required: Users targeting React Native should verify their integration, particularly if relying on specific Blob or FormData behaviours, as improvements have been made to support these objects.

🚀 New Features

• React Native Blob Support: Axios now includes support for React Native Blob objects. Thanks to @moh3n9595 for the initial implementation. (#5764)
• Code Quality: Implemented prettier across the codebase and resolved associated formatting issues. (#7385)

🐛 Bug Fixes

• Environment Compatibility:

  • Fixed module exports for React Native and Browserify environments. (#7386)
  • Added safe FormData detection for the WeChat Mini Program environment. (#7324)

• Error Handling:

  • AxiosError.message is now correctly enumerable. (#7392)
  • AxiosError.from now correctly copies the status property from the source error, ensuring better error propagation. (#7403)

🔧 Maintenance & Chores

• Dependencies: Updated the development_dependencies group (5 updates). (#7432)
• Infrastructure: Migrated @rollup/plugin-babel from v5.3.1 to v6.1.0. (#7424)
• Documentation: Added missing JSDoc comments to utilities. (#7427)

🌟 New Contributors

We are thrilled to welcome our new contributors! Thank you for helping improve the project:

• @Gudahtt (#7386)
• @ybbus (#7392)
• @Shiwaangee (#7324)
• @skrtheboss (#7403)
• @Janaka66 (#7427)
• @moh3n9595 (#5764)
• @digital-wizard48 (#7424)

Full Changelog: v1.13.5...v1.13.6

This is a critical security maintenance release for the v0.x branch. It addresses a high-priority vulnerability involving prototype pollution that could lead to a Denial of Service (DoS).

Recommendation: All users currently on the 0.x release line should upgrade to this version immediately to ensure environment stability.

🛡️ Security Fixes

• Backport: Fix DoS via proto key in merge config
  • Patched a vulnerability where specifically crafted configuration objects using the proto key could cause a Denial of Service during the merge process. - by @FeBe95 in PR #7388

⚙️ Maintenance & CI

• CI Infrastructure Update
  • Updated Continuous Integration workflows for the v0.x branch to maintain long-term support and build reliability. - by @jasonsaayman in PR #7407

⚠️ Breaking Changes

Configuration Merging Behavior:

As part of the security fix, Axios now restricts the merging of the proto key within configuration objects. If your codebase relies on unconventional deep-merging patterns that target the object prototype via Axios config, those operations will now be blocked. This is a necessary change to prevent prototype pollution.

Full Changelog: v0.30.2...v0.30.3

Release 1.13.5

Highlights

• Security: Fixed a potential Denial of Service issue involving the __proto__ key in mergeConfig. (PR #7369)
• Bug fix: Resolved an issue where AxiosError could be missing the status field on and after v1.13.3. (PR #7368)

Changes

Security

• Fix Denial of Service via __proto__ key in mergeConfig. (PR #7369)

Fixes

• Fix/5657. (PR #7313)
• Ensure status is present in AxiosError on and after v1.13.3. (PR #7368)

Features / Improvements

• Add input validation to isAbsoluteURL. (PR #7326)
• Refactor: bump minor package versions. (PR #7356)

Documentation

• Clarify object-check comment. (PR #7323)
• Fix deprecated Buffer constructor usage and README formatting. (PR #7371)

CI / Maintenance

• Chore: fix issues with YAML. (PR #7355)
• CI: update workflow YAMLs. (PR #7372)
• CI: fix run condition. (PR #7373)
• Dev deps: bump karma-sourcemap-loader from 0.3.8 to 0.4.0. (PR #7360)
• Chore(release): prepare release 1.13.5. (PR #7379)

New Contributors

• @sachin11063 (first contribution — PR #7323)
• @asmitha-16 (first contribution — PR #7326)

Full Changelog: v1.13.4...v1.13.5