CVE-2026-88968

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{"affected": [{"affectedData": [{"product": "claude-code", "vendor": "anthropics", "versions": [{"status": "affected", "version": "< 2.1.251"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Claude Code is an agentic coding tool. Prior to 2.1.251, the Edit tool validates a target using pathname and symlink resolution that is not bound to the underlying directory inode or file descriptor. On macOS, attacker-controlled code running in the Bash sandbox can atomically replace an in-workspace parent directory with a symlink after validation, causing the unsandboxed Edit implementation to overwrite a user-writable file outside the workspace. Exploitation requires attacker-controlled code to run inside the sandbox, such as from a malicious repository or dependency script. This issue is fixed in version 2.1.251."}], "id": "CVE-2026-88968", "lastModified": "2026-11-03T22:19:50.413", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.7, "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": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/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-2026-88968", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-11-03T21:29:03.036554Z", "version": "2.0.3"}}]}, "published": "2026-11-03T20:18:19.010", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/anthropics/claude-code/releases/tag/v2.1.251"}, {"source": "security-advisories@github.com", "url": "https://github.com/anthropics/claude-code/security/advisories/GHSA-5xjx-9qx6-jcrv"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}, {"lang": "en", "value": "CWE-367"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "claude-code: claude-code: Sandbox escape via symlink replacement", "id": "2566282", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2566282"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["A flaw was found in Claude Code. An attacker capable of executing code within the tool's sandbox can overwrite arbitrary files outside the designated workspace, leading to a sandbox escape. This issue occurs because the Edit tool verifies file paths without securing them against changes to the underlying directory structure. By replacing a verified directory with a symbolic link (a reference pointing to another file path), the attacker can redirect file modification operations to sensitive locations on the host system."], "name": "CVE-2026-88968", "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": "2026-11-03T20:08:47Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-88968\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-88968\nhttps://github.com/anthropics/claude-code/releases/tag/v2.1.251\nhttps://github.com/anthropics/claude-code/security/advisories/GHSA-5xjx-9qx6-jcrv"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.1.251)"}}], "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": "2026-11-04T00:00:08.483657+00:00", "updated": "2026-11-04T01:30:06.733176+00:00", "vendors": ["anthropics", "anthropics$PRODUCT$claude_code"]}