{"success":true,"data":{"threats":[{"id":"1651320f-aa6f-4cee-87cc-fd181f5a0a37","slug":"cve-2026-103435","externalId":"CVE-2026-103435","source":"NVD","sourceType":"cve-db","type":"vulnerability","title":"CVE-2026-103435 — Claude Code validated that a target file path resided within the project working directory at permission-check time, but re-resolved the path at wr…","description":"Claude Code validated that a target file path resided within the project working directory at permission-check time, but re-resolved the path at write time without repeating that validation. This time-of-check to time-of-use (TOCTOU) gap allowed an attacker who could write to the workspace to atomically replace a project file with a symlink, causing Claude Code to follow the symlink and write its output to an arbitrary file outside the project sandbox. Exploitation required the ability to win a race condition against the write operation and write access to the shared workspace, enabling a lower-privileged attacker to redirect benign edits to sensitive files (e.g., shell configuration) in a higher-privileged session.\n\nUsers on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version.\n\nThank you to hackerone.com/c_h4ck_0 for reporting this issue.","cveId":"CVE-2026-103435","cvssScore":7.7,"cvssVector":"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","severity":"high","vendor":null,"product":null,"affectedVersions":[],"cwes":["CWE-22","CWE-61","CWE-367"],"tags":["nvd","status:awaiting-analysis"],"relatedCves":[],"titleFingerprint":null,"countryCodes":[],"knownExploited":false,"patchAvailable":false,"patchLinks":[],"references":[{"url":"https://github.com/anthropics/claude-code/security/advisories/GHSA-5j29-h97v-84ch","type":"advisory","title":"98a01053-8a31-4f6d-9aa9-252be161adc6"}],"epssScore":0.00251,"epssPercentile":0.15086,"nucleiTemplatePath":null,"nucleiSeverity":null,"enrichment":null,"publishedAt":"2026-10-07T13:17:16.690Z","addedAt":"2026-10-07T14:39:35.072Z","updatedAt":"2026-10-07T16:39:32.117Z","epssUpdatedAt":"2026-10-08T12:00:21.000Z","nucleiUpdatedAt":null,"links":[{"label":"NVD","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103435","note":"ingested from NVD"},{"label":"CVE Program","url":"https://www.cve.org/CVERecord?id=CVE-2026-103435","note":"authoritative record"}],"raw":{"id":"CVE-2026-103435","cveTags":[],"metrics":{"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2026-103435","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-07T14:39:02.916533Z"}}],"cvssMetricV40":[{"type":"Secondary","source":"98a01053-8a31-4f6d-9aa9-252be161adc6","cvssData":{"Safety":"NOT_DEFINED","version":"4.0","Recovery":"NOT_DEFINED","baseScore":7.7,"Automatable":"NOT_DEFINED","attackVector":"NETWORK","baseSeverity":"HIGH","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","exploitMaturity":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","userInteraction":"PASSIVE","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","subIntegrityImpact":"NONE","vulnIntegrityImpact":"HIGH","integrityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","subAvailabilityImpact":"NONE","vulnAvailabilityImpact":"HIGH","availabilityRequirement":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","subConfidentialityImpact":"NONE","vulnConfidentialityImpact":"HIGH","confidentialityRequirement":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED"}}]},"affected":[{"source":"98a01053-8a31-4f6d-9aa9-252be161adc6","affectedData":[{"vendor":"Anthropic","product":"@anthropic-ai/claude-code","versions":[{"status":"affected","version":"0","lessThan":"2.1.129","versionType":"semver"}]}]}],"published":"2026-10-07T13:17:16.690","references":[{"url":"https://github.com/anthropics/claude-code/security/advisories/GHSA-5j29-h97v-84ch","source":"98a01053-8a31-4f6d-9aa9-252be161adc6"}],"vulnStatus":"Awaiting Analysis","weaknesses":[{"type":"Secondary","source":"98a01053-8a31-4f6d-9aa9-252be161adc6","description":[{"lang":"en","value":"CWE-22"},{"lang":"en","value":"CWE-61"},{"lang":"en","value":"CWE-367"}]}],"descriptions":[{"lang":"en","value":"Claude Code validated that a target file path resided within the project working directory at permission-check time, but re-resolved the path at write time without repeating that validation. 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Users performing manual updates are advised to update to the latest version.\n\nThank you to hackerone.com/c_h4ck_0 for reporting this issue."}],"lastModified":"2026-10-07T15:16:57.037","sourceIdentifier":"98a01053-8a31-4f6d-9aa9-252be161adc6"}}],"pagination":{"page":1,"limit":20,"total":1,"totalPages":1,"hasNext":false,"hasPrev":false}},"meta":{"apiVersion":"v1","requestedAt":"2026-10-08T23:49:58.862Z","durationMs":5,"filters":{"search":null,"severity":[],"type":[],"country":[],"tag":[],"cwe":[],"vendor":null,"product":null,"cve":"CVE-2026-103435","source":[],"days":null,"publishedAfter":null,"publishedBefore":null,"minCvss":null,"maxCvss":null,"minEpss":null,"knownExploited":null,"hasPatch":null,"hasNucleiTemplate":null},"sort":"newest","unknownParams":["include"],"warnings":[]}}