OCPBUGS-100520: Bump postcss to 8.5.26 to fix CVE-2026-45623

[prabhapa]

CVE Remediation

Bumps postcss from 8.2.13 to 8.5.26 to fix CVE-2026-45623.

Vulnerability

CVE-2026-45623 (Moderate, CVSS 7.5): PostCSS PreviousMap parses sourceMappingURL comments and dereferences paths against the local filesystem without scheme, allowlist, or traversal checks. An attacker controlling CSS input can read arbitrary files and cause DoS. Fixed in postcss 8.5.12.

Changes

• Updated resolutions in frontend/package.json: "postcss": "^8.2.13" → "^8.5.26"
• Regenerated frontend/yarn.lock
• Transitive deps updated: nanoid 3.1.22 → 3.3.18, picocolors and source-map-js added

Testing

All 4000 tests passed (585 suites, 0 failures).

Jira

• OCPBUGS-100520

[openshift-merge-bot]

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[openshift-ci-robot]

@prabhapa: This pull request references Jira Issue OCPBUGS-100520, which is invalid:

• expected dependent Jira Issue OCPBUGS-100521 to be in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but it is New instead

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

Details

In response to this:

CVE Remediation

Bumps postcss from 8.2.13 to 8.5.26 to fix CVE-2026-45623.

Vulnerability

CVE-2026-45623 (Moderate, CVSS 7.5): PostCSS PreviousMap parses sourceMappingURL comments and dereferences paths against the local filesystem without scheme, allowlist, or traversal checks. An attacker controlling CSS input can read arbitrary files and cause DoS. Fixed in postcss 8.5.12.

Changes

• Updated resolutions in frontend/package.json: "postcss": "^8.2.13" → "^8.5.26"
• Regenerated frontend/yarn.lock
• Transitive deps updated: nanoid 3.1.22 → 3.3.18, picocolors and source-map-js added

Testing

All 4000 tests passed (585 suites, 0 failures).

Jira

• OCPBUGS-100520

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: prabhapa
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[openshift-ci]

@prabhapa: all tests passed!

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