CVE-2026-86063

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{"affected": [{"affectedData": [{"product": "claude-code", "vendor": "anthropics", "versions": [{"status": "affected", "version": "< 2.1.179"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-86063", "lastModified": "2026-10-13T21:19:36.730", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-86063", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-13T20:14:06.546364Z", "version": "2.0.3"}}]}, "published": "2026-10-13T19:21:21.417", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/anthropics/claude-code/releases/tag/v2.1.179"}, {"source": "security-advisories@github.com", "url": "https://github.com/anthropics/claude-code/security/advisories/GHSA-pq7j-f95f-qfcv"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-494"}, {"lang": "en", "value": "CWE-829"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "claude-code: Claude Code: arbitrary code execution via unverified commit hash during plugin installation", "id": "2551595", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2551595"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-494", "details": ["A flaw was found in Claude Code. When installing a plugin pinned to a specific commit hash, the application does not verify that the checked-out version matches the expected Secure Hash Algorithm (SHA) identifier. A remote attacker controlling a repository can create a branch named after the reviewed commit hash, tricking the tool into installing attacker-controlled code instead of the approved version. If a user installs the plugin, this issue can lead to arbitrary code execution."], "name": "CVE-2026-86063", "package_state": [{"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Affected", "package_name": "devspaces/pluginregistry-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}], "public_date": "2026-10-13T19:04:11Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-86063\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-86063\nhttps://github.com/anthropics/claude-code/releases/tag/v2.1.179\nhttps://github.com/anthropics/claude-code/security/advisories/GHSA-pq7j-f95f-qfcv"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.1.179)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "claude-code", "source": "cna", "vendor": "anthropics"}, "product": "claude_code", "vendor": "anthropics"}], "created": "2026-10-14T08:45:18.726395+00:00", "updated": "2026-10-15T17:15:14.448574+00:00", "vendors": ["anthropics", "anthropics$PRODUCT$claude_code"]}