{"id":"CVE-2026-86063","state":"PUBLISHED","title":"Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning","description":"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.","publishedAt":"2026-10-13T19:04:11.695Z","updatedAt":"2026-10-13T20:21:00.156Z","severity":{"score":7.5,"label":"High","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["anthropics claude-code"],"affected":[{"vendor":"anthropics","product":"claude-code","versions":[{"version":"< 2.1.179","status":"affected"}]}],"references":["https://github.com/anthropics/claude-code/security/advisories/GHSA-pq7j-f95f-qfcv","https://github.com/anthropics/claude-code/releases/tag/v2.1.179"],"weaknesses":["CWE-494","CWE-829"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/86xxx/CVE-2026-86063.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-86063","state":"PUBLISHED","datePublished":"2026-10-13T19:04:11.695Z","dateUpdated":"2026-10-13T20:21:00.156Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-04T19:34:03.099Z"},"containers":{"cna":{"title":"Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"anthropics","product":"claude-code","versions":[{"version":"< 2.1.179","status":"affected"}]}],"references":[{"url":"https://github.com/anthropics/claude-code/security/advisories/GHSA-pq7j-f95f-qfcv","name":"https://github.com/anthropics/claude-code/security/advisories/GHSA-pq7j-f95f-qfcv","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/anthropics/claude-code/releases/tag/v2.1.179","name":"https://github.com/anthropics/claude-code/releases/tag/v2.1.179","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-494","lang":"en","description":"CWE-494: Download of Code Without Integrity Check","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-829","lang":"en","description":"CWE-829: Inclusion of Functionality from Untrusted Control Sphere","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-13T19:04:11.695Z"},"source":{"advisory":"GHSA-pq7j-f95f-qfcv","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-13T20:14:06.546364Z","id":"CVE-2026-86063","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-13T20:21:00.156Z"}}]}}}