Fix immutable Prototype Pollution vulnerability (CVE-2026-29063)

[JanPokorny]

Summary

Adds an override in pnpm-workspace.yaml to fix CVE-2026-29063 / GHSA-wf6x-7x77-mvgw, a Prototype Pollution vulnerability in the immutable package. The override ensures that immutable is pinned to version 5.1.5 or higher when versions 5.0.0 through 5.1.4 would otherwise be resolved.

This vulnerability is transitive via sass and sass-embedded dependencies.

Linked Issues

Documentation

• No Docs Needed: This is a security vulnerability fix in dependency management configuration.

https://claude.ai/code/session_01Eh1WktrxtXkU11zWJtDisj

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a critical security vulnerability (CVE-2026-29063) related to Prototype Pollution within the immutable package. The fix involves configuring pnpm to enforce a specific, secure version of immutable across the project's dependencies, thereby mitigating the risk posed by this transitive vulnerability.

Highlights

• Vulnerability Fix: Addressed CVE-2026-29063, a Prototype Pollution vulnerability found in the immutable package.
• Dependency Override: Implemented a pnpm override in pnpm-workspace.yaml to ensure that immutable is pinned to version 5.1.5 when versions 5.0.0 through 5.1.4 would otherwise be resolved.
• Transitive Dependency: The vulnerability is noted to be transitive, affecting the project via sass and sass-embedded dependencies.

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Changelog

• pnpm-lock.yaml
  • Updated @carbon/react to version 1.102.0.
  • Added an override rule for immutable versions between 5.0.0 and 5.1.5 to resolve to 5.1.5.
  • Updated the resolved version of immutable from 5.1.4 to 5.1.5, including its integrity hash.
  • Updated immutable dependency version for sass-embedded to 5.1.5.
  • Updated immutable dependency version for sass to 5.1.5.
• pnpm-workspace.yaml
  • Added a new override rule to enforce immutable version 5.1.5 for vulnerable ranges, along with comments explaining the CVE and its transitive nature.

Activity

• No specific activity (comments, reviews, etc.) has been recorded for this pull request yet.

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[gemini-code-assist]

Code Review

This pull request correctly addresses the Prototype Pollution vulnerability (GHSA-wf6x-7x77-mvgw) in the immutable package by adding an override in pnpm-workspace.yaml to enforce version 5.1.5. The changes in pnpm-lock.yaml are consistent with this override. I have one suggestion to improve the accuracy of the comment associated with this security fix.

[gemini-code-assist]

The CVE identifier CVE-2026-29063 appears to be incorrect. The year 2026 is in the future, and the associated GitHub Security Advisory GHSA-wf6x-7x77-mvgw does not have a CVE assigned to it. To avoid confusion and maintain accurate documentation, it's best to remove the incorrect CVE reference from the comment.

  # Fix GHSA-wf6x-7x77-mvgw: immutable Prototype Pollution vulnerability