Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning

影響: npm:@anthropic-ai/claude-code < 2.1.179 → 2.1.179

The plugin install flow in Claude Code and Claude Desktop checked out a marketplace's pinned commit SHA using git checkout without verifying that the resulting HEAD matched the pinned SHA. An attacker controlling a plugin's upstream repository could create a branch named identically to the pinned 40-character SHA, causing the checkout to silently resolve to the attacker's branch tip instead of the reviewed commit, resulting in attacker-controlled code being installed bypassing the pinned hash.…

Read on GitHub Advisory Database

On 10/16/2026, 05:22 AM, GitHub Advisory Database published "Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning" (type: Advisory). Severity is "High" (high). Related technologies: JavaScript / Node.js, Anthropic (Claude). CVE: CVE-2026-86063.