CVE-2026-86063

CVE-2026-86063 · Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Claude Code is an agentic coding tool. Prior to 2.1.179, the Claude Code and Claude Desktop plugin installation flow runs git checkout for a marketplace-pinned commit without verifying that the resulting HEAD equals the pinned 40-character SHA. An attacker who controls a plugin repository on a Git host that permits SHA-shaped branch names can create a branch named after the reviewed commit, causing checkout to select the branch tip and install attacker-controlled plugin code. Exploitation requires a user to install the malicious plugin and pin it to the ostensibly safe hash. This issue is fixed in version 2.1.179.

CVSS 7.5 · High · EPSS 0.2% · Fix available

Published

2026-10-13T19:04:11.695Z

Updated

2026-10-13T20:21:00.156Z

Stack: node

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