GCD AI RADAR
incidents/AIR-2026-0317

CVE-2026-86063: Claude Code plugin installation flow hash pin bypass vulnerability

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerabilitySupply chain

Claude Code prior to version 2.1.179 runs git checkout for marketplace-pinned commits without verifying the resulting HEAD hash. Attackers can create branch names matching reviewed commits to install unauthorized attacker-controlled plugin code.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

Details

type
Attack on AI
An AI model, agent or AI-powered product was the thing exploited, abused or leaked.
categories
  • Infrastructure vulnerabilityprimary
    CVEs and advisories in AI frameworks, inference servers, MCP servers, AI developer tools and hosting stacks.
  • Supply chain
    Malicious or backdoored models, poisoned packages, unsafe deserialization and other compromised AI dependencies.
owasp llm top 10
mitre atlas
Both rows are derived from the type and categories (OWASP 2025 edition, ATLAS release 2026.09), not classified per record. How
severity
2 · Disclosed vulnerability
CVE or vendor advisory, patched or patchable, no confirmed exploitation.
targets
Anthropic, Framework / tooling
products
Claude Code
incident date
13 Oct 2026
first reported
13 Oct 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
classifier confidence
0.95 · published at or above 0.80; see the methodology
tags
CVE-2026-86063 · claude-code · hash-pinning
record
created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z · json

Sources · 2

  1. 2026-10-13
    CVE-2026-86063: Claude Code is an agentic coding tool.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-86063
  2. 2026-10-15
    CVE-2026-86063: Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning
    GitHub Advisory Database · github.com/advisories/GHSA-pq7j-f95f-qfcv

Titles and links belong to their publishers. The summary above is written by GCD AI RADAR in its own words; data is CC BY-SA 4.0.

Related incidents