fix(root): pin postcss to 8.5.12 to address CVE-2026-45623#9342
Merged
Conversation
GHSA-6g55-p6wh-862q (CVSS 7.5 HIGH): postcss <=8.5.11 arbitrary file read and information disclosure via attacker-controlled sourceMappingURL in CSS comments. Published to the GitHub Advisory DB 2026-07-23, which caused the osv-severity-gate to fail publish run #2895. All existing postcss ranges (^8.2.14..^8.5.6) admit 8.5.12, so this is a patch-level pin via root resolutions/overrides, consistent with prior security pins (e.g. fast-uri, protobufjs).
There was a problem hiding this comment.
Pull request overview
Pins postcss to a patched version at the repo root to unblock releases failing the vulnerability severity gate due to CVE-2026-45623 / GHSA-6g55-p6wh-862q. This is a dependency-management change affecting the build/tooling dependency graph (via lockfile + root overrides), not runtime signing/wallet logic.
Changes:
- Add a root pin for
postcss@8.5.12inpackage.jsonunder bothresolutionsandoverrides. - Update
yarn.lockso allpostcssranges resolve to8.5.12(single entry updated).
Reviewed changes
Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| package.json | Pins postcss to 8.5.12 via root resolutions and overrides to force the patched version across the dependency tree. |
| yarn.lock | Updates the locked postcss artifact to 8.5.12 (resolved URL + integrity), ensuring installs pick up the patched version. |
💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.
mukeshsp
approved these changes
Jul 23, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Why
Publish run #2895 failed at the Enforce Vulnerability Severity Threshold gate:
The blocking finding is postcss@8.5.10 — GHSA-6g55-p6wh-862q / CVE-2026-45623 (CVSS 7.5 HIGH): arbitrary file read + information disclosure via attacker-controlled
sourceMappingURLin CSS comments. Published to the GitHub Advisory DB 2026-07-23 (today), which is why the previously green release started failing.What
postcssto 8.5.12 (first patched version) in rootresolutionsandoverrides, consistent with prior security pins (fast-uri, protobufjs, webpack).yarn.lockupdate for the singlepostcssentry. All existing ranges (^8.2.14–^8.5.6) admit 8.5.12, so this is a patch-level bump.Verification
yarn install --frozen-lockfilepasses with the updated lockfileyarn.lock