chore(deps): bump postcss from 8.5.8 to 8.5.15 in /frontend

[dependabot]

Bumps postcss from 8.5.8 to 8.5.15.

Release notes

Sourced from postcss's releases.

8.5.15

• Fixed declaration parsing performance (by @​homanp).

8.5.14

• Fixed custom syntax regression (by @​43081j).

8.5.13

• Fixed postcss-scss commend regression.

8.5.12

• Fixed reading any file via user-generated CSS.
• Added opts.unsafeMap to disable checks.

8.5.11

• Fixed nested brackets parsing performance (by @​offset).

8.5.10

• Fixed XSS via unescaped </style> in non-bundler cases (by @​TharVid).

8.5.9

• Speed up source map encoding paring in case of the error.

Changelog

Sourced from postcss's changelog.

8.5.15

• Fixed declaration parsing performance (by @​homanp).

8.5.14

• Fixed custom syntax regression (by @​43081j).

8.5.13

• Fixed postcss-scss commend regression.

8.5.12

• Fixed reading any file via user-generated CSS.
• Added opts.unsafeMap to disable checks.

8.5.11

• Fixed nested brackets parsing performance (by @​offset).

8.5.10

• Fixed XSS via unescaped </style> in non-bundler cases (by @​TharVid).

8.5.9

• Speed up source map encoding paring in case of the error.

Commits

• eae46db Release 8.5.15 version
• 79508ff Update CI actions
• b128e21 Speed up declaration parsing by avoiding creating new array on each token
• 9825dca Fix code format
• 55789c8 Update dependencies
• 84fbbe9 Install older pnpm action for old Node.js
• 9f860bd Revert pnpm action for old Node.js
• 0877198 Update CI actions
• b2d1a33 Fix linter warnings
• 0700dac Merge pull request #2088 from rootvector2/add-oss-fuzz-harness
• Additional commits viewable in compare view

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[greptile-apps]

Greptile Summary

This PR bumps postcss from 8.5.8 to 8.5.15 in the frontend directory, picking up several patch releases that include security and performance fixes.

• 8.5.12 patched a path traversal vulnerability where arbitrary files could be read via user-generated CSS source maps; 8.5.10 fixed an XSS issue with unescaped </style> in non-bundler scenarios.
• Intermediate releases (8.5.9–8.5.14) include parsing performance improvements and regression fixes for custom syntax.

Confidence Score: 5/5

Safe to merge — a routine patch-level dependency bump with no breaking changes and important security fixes included.

The change is a single-line version bump within the same semver minor, updating postcss from 8.5.8 to 8.5.15. All intermediate releases are patch fixes (security, performance, regression); no API changes were introduced. The ^ range in package.json means this was already installable before the bump — the PR simply makes the minimum pinned version explicit.

No files require special attention.

Important Files Changed

Filename	Overview
frontend/package.json	Single-line bump of postcss from ^8.5.8 to ^8.5.15; picks up security fixes and performance improvements with no API-breaking changes.

_{Reviews (1): Last reviewed commit: "chore(deps): bump postcss from 8.5.8 to ..." | Re-trigger Greptile}