CVE-2026-86063: Claude Code plugin install flow allowed bypass of commit hash pinning (< 2.1.179)
- Product
- @anthropic-ai/claude-code (npm)
- CVE
- CVE-2026-86063
- Affected
- < 2.1.179
- Fixed in
- 2.1.179
Last verified against sources: October 16, 2026
Am I affected?
@anthropic-ai/claude-code (npm): affected < 2.1.179. Fixed in 2.1.179.
What to do now
- Update Claude Code to 2.1.179 or later. [1]
General practice, not from the source: if the affected software could read tokens or credentials, rotate them after upgrading; pin versions and review changes before updating tools your agents run.
What happened
- According to GitHub Advisory Database's advisory (Oct 15, 2026), the plugin install flow in Claude Code and Claude Desktop checked out a marketplace's pinned commit SHA using git checkout without verifying that HEAD matched the pinned SHA. [1]
Impact
- An attacker controlling a plugin repository could create a branch named identically to the 40-character SHA so checkout resolved to the branch tip instead of the reviewed commit. [1]
What was done
- Fixed in @anthropic-ai/claude-code 2.1.179. [1]
Sources
- GHSA-pq7j-f95f-qfcv — GitHub Advisory Database
Every statement above was checked against these sources before publishing. Spotted an error? Tell us and we will correct it with a dated note.
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[CVE-2026-86063] CVE-2026-86063: Claude Code plugin install flow allowed bypass of commit hash pinning (< 2.1.179)
Product: @anthropic-ai/claude-code (npm) | Affected: < 2.1.179 | Fixed in: 2.1.179
Summary: According to GitHub Advisory Database's advisory (Oct 15, 2026), the plugin install flow in Claude Code and Claude Desktop checked out a marketplace's pinned commit SHA using git checkout without verifying that HEAD matched the pinned SHA.
Source & remediation on AgentArmorHQ: https://agentarmorhq.com/incidents/2026/10/cve-2026-86063-claude-code-plugin-hash-pin-bypassCorrections
Report an error or request a correction. We review requests within 5 business days and add a dated correction note.
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