OCPBUGS-101788: Bump postcss to fix CVE-2026-69153

[prabhapa]

CVE-2026-69153: PostCSS Information Disclosure

Bumps postcss from 8.4.31 to 8.5.26 (fixed in >=8.5.19) to address CVE-2026-69153.

Vulnerability

PostCSS prior to 8.5.19 allows an attacker to cause PreviousMap.loadFile() to read an unintended source-map file by supplying an absolute or directory-traversal sourceMappingURL when from is unset. The resulting map's sources and sourcesContent may then be exposed to the application.

Changes

• frontend/package.json: Updated resolutions.postcss from ^8.2.13 to ^8.5.19
• frontend/yarn.lock: Regenerated — postcss 8.4.31 → 8.5.26 (plus transitive deps nanoid, source-map-js)

Jira

• OCPBUGS-101788

[openshift-merge-bot]

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[openshift-ci-robot]

@prabhapa: This pull request references Jira Issue OCPBUGS-101788, which is invalid:

• expected Jira Issue OCPBUGS-101788 to depend on a bug targeting a version in 4.16.0, 4.16.z and in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but no dependents were found

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-2026-69153: PostCSS Information Disclosure

Bumps postcss from 8.4.31 to 8.5.26 (fixed in >=8.5.19) to address CVE-2026-69153.

Vulnerability

PostCSS prior to 8.5.19 allows an attacker to cause PreviousMap.loadFile() to read an unintended source-map file by supplying an absolute or directory-traversal sourceMappingURL when from is unset. The resulting map's sources and sourcesContent may then be exposed to the application.

Changes

• frontend/package.json: Updated resolutions.postcss from ^8.2.13 to ^8.5.19
• frontend/yarn.lock: Regenerated — postcss 8.4.31 → 8.5.26 (plus transitive deps nanoid, source-map-js)

Jira

• OCPBUGS-101788

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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]

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