CVE-2026-86063Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning
Updated under an hour ago ()
Does this affect you?
It affects anthropics claude-code. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.17%, higher than 6% of scored CVEs.
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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 (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-494, CWE-829
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.17% (percentile 6)
- Assigned by
- GitHub_M
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 13, 2026
- First seen by InfoSec Signals
- Oct 13, 2026
Affected products
anthropics claude-code anthropics:claude_code (from the name) | before 2.1.179 | CNA record |
References
- https://github.com/anthropics/claude-code/security/advisories/GHSA-pq7j-f95f-qfcvx-refsource-confirm
- https://github.com/anthropics/claude-code/releases/tag/v2.1.179x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.