Add taint propagation via "for" comprehensions#564
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LGTM
I suggest to open follow-up issues to later fix the rest from your description.
This was referenced Feb 3, 2026
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This MR contains the following updates: | Package | Update | Change | |---|---|---| | [opengrep/opengrep](https://github.com/opengrep/opengrep) | minor | `v1.15.1` → `v1.16.0` | MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot). **Proposed changes to behavior should be submitted there as MRs.** --- ### Release Notes <details> <summary>opengrep/opengrep (opengrep/opengrep)</summary> ### [`v1.16.0`](https://github.com/opengrep/opengrep/releases/tag/v1.16.0): Opengrep 1.16.0 [Compare Source](opengrep/opengrep@v1.15.1...v1.16.0) #### Improvements - Dart: Add typed metavariabless by [@​maciejpirog](https://github.com/maciejpirog) in [#​551](opengrep/opengrep#551) - Dart: Use case of identifier to guess call vs new by [@​maciejpirog](https://github.com/maciejpirog) in [#​555](opengrep/opengrep#555) - Go: Enable goroutines in taint tracking by [@​maciejpirog](https://github.com/maciejpirog) in [#​559](opengrep/opengrep#559) - Add taint propagation via "for" comprehensions by [@​maciejpirog](https://github.com/maciejpirog) in [#​564](opengrep/opengrep#564) #### Bug Fixes - Rust: Missing Rust type alias translation by [@​smith-xyz](https://github.com/smith-xyz) in [#​549](opengrep/opengrep#549) - Fix: Ensure that linux binaries have 8mb stack size (musl) by [@​dimitris-m](https://github.com/dimitris-m) in [#​563](opengrep/opengrep#563) - Fixed a perf regression by removing system calls and improving the reachability graph and the callee lookup by [@​corneliuhoffman](https://github.com/corneliuhoffman) in [#​556](opengrep/opengrep#556) - Fixed intrafile bug introduced by a superfluous fallback by [@​corneliuhoffman](https://github.com/corneliuhoffman) in [#​567](opengrep/opengrep#567) - Ruby: Always translate `or` and `and` to expression by [@​maciejpirog](https://github.com/maciejpirog) in [#​562](opengrep/opengrep#562) - Bash: Allow redirects before command arguments by [@​maciejpirog](https://github.com/maciejpirog) in [#​548](opengrep/opengrep#548) #### Internal Improvements - Add `show dump-intrafile-graph` and `show dump-taint-signatures` commands by [@​corneliuhoffman](https://github.com/corneliuhoffman) in [#​552](opengrep/opengrep#552) - Improve tainting code by [@​maciejpirog](https://github.com/maciejpirog) in [#​546](opengrep/opengrep#546) - Graph refactoring by [@​corneliuhoffman](https://github.com/corneliuhoffman) in [#​553](opengrep/opengrep#553) #### New Contributors - [@​smith-xyz](https://github.com/smith-xyz) made their first contribution in [#​549](opengrep/opengrep#549) **Full Changelog**: <opengrep/opengrep@v1.15.1...v1.16.0> </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 MR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this MR, check this box --- This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi45Ni4yIiwidXBkYXRlZEluVmVyIjoiNDIuOTYuMiIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiUmVub3ZhdGUgQm90IiwiYXV0b21hdGlvbjpib3QtYXV0aG9yZWQiLCJkZXBlbmRlbmN5LXR5cGU6Om1pbm9yIl19-->
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Closes #554
This PR
Before, taint was lost on comprehensions (which were translated to a "todo" in IL). We fix it by adding translation of comprehensions in AST_to_IL. A comprehension like
is translated to an equivalent of
The implementation is an adjusted version of the translation of
for eachloop.TODO for future
Multiple "for"
As in:
The "if" part
As in: