[release-1.19] fix(acme/http01): solver mishandles host headers containing an IPv6 address without a port number#8436
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cert-manager-prow[bot] merged 1 commit intocert-manager:release-1.19from Jan 23, 2026
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For IPv6 addresses, the Host header may contain square brackets Signed-off-by: SlashNephy <slashnephy@hatena.ne.jp>
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: SgtCoDFish The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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This PR contains the following updates: | Package | Update | Change | |---|---|---| | [cert-manager](https://cert-manager.io) ([source](https://github.com/cert-manager/cert-manager)) | patch | `v1.19.2` → `v1.19.3` | --- ### Release Notes <details> <summary>cert-manager/cert-manager (cert-manager)</summary> ### [`v1.19.3`](https://github.com/cert-manager/cert-manager/releases/tag/v1.19.3) [Compare Source](cert-manager/cert-manager@v1.19.2...v1.19.3) cert-manager is the easiest way to automatically manage certificates in Kubernetes and OpenShift clusters. This release contains three bug fixes, including a fix for the MODERATE severity DoS issue in GHSA-gx3x-vq4p-mhhv. All users should upgrade to the latest release. #### Changes by Kind ##### Bug or Regression - Fixed an infinite re-issuance loop that could occur when an issuer returns a certificate with a public key that doesn't match the CSR. The issuing controller now validates the certificate before storing it and fails with backoff on mismatch. ([#​8415](cert-manager/cert-manager#8415), [@​cert-manager-bot](https://github.com/cert-manager-bot)) - Fixed an issue where HTTP-01 challenges failed when the Host header contained an IPv6 address. This means that users can now issue IP address certificates for IPv6 address subjects. ([#​8436](cert-manager/cert-manager#8436), [@​cert-manager-bot](https://github.com/cert-manager-bot)) - Security (MODERATE): Fix a potential panic in the cert-manager controller when a DNS response in an unexpected order was cached. If an attacker was able to modify DNS responses (or if they controlled the DNS server) it was possible to cause denial of service for the cert-manager controller. ([#​8468](cert-manager/cert-manager#8468), [@​SgtCoDFish](https://github.com/SgtCoDFish)) ##### Other (Cleanup or Flake) - Bump go to 1.25.6 ([#​8459](cert-manager/cert-manager#8459), [@​SgtCoDFish](https://github.com/SgtCoDFish)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi45NS4yIiwidXBkYXRlZEluVmVyIjoiNDIuOTUuNSIsInRhcmdldEJyYW5jaCI6Im1hc3RlciIsImxhYmVscyI6W119--> Reviewed-on: https://kubara.git.onstackit.cloud/STACKIT/kubara/pulls/261
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This is an automated cherry-pick of #8424
/assign SgtCoDFish