{"data":{"id":"b9541707-aa44-488f-b44b-74e8caf518ad","title":"CVE-2026-27795: LangChain is a framework for building LLM-powered applications. Prior to version 1.1.8, a redirect-based Server-Side…","summary":"Prior to version 1.1.8, the `RecursiveUrlLoader` in `@langchain/community` contains a redirect-based SSRF bypass. The loader validates the initial URL but lets the underlying fetch follow redirects automatically, so a request can move from a safe public URL to an internal or metadata endpoint without revalidation. The flaw bypasses the SSRF protections introduced in 1.1.14 (CVE-2026-26019).","solution":"Upgrade `@langchain/community` to 1.1.18, which disables automatic redirects (`redirect: \"manual\"`), resolves and validates each 3xx `Location` target with `validateSafeUrl()` before the next request, and enforces a maximum redirect limit.","labels":["security"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-27795","publishedAt":"2026-02-25T18:23:41.153Z","cveId":"CVE-2026-27795","cweIds":["CWE-918"],"cvssScore":"4.1","cvssSeverity":"medium","severity":"medium","attackType":["other"],"issueType":"vulnerability","affectedPackages":["@langchain/community@<= 1.1.17 (fixed: 1.1.18)"],"affectedPackageNames":["@langchain/community"],"affectedPackageRefs":["npm:@langchain/community"],"affectedVendors":["LangChain"],"affectedVendorsRaw":["LangChain","@langchain/community","RecursiveUrlLoader"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":"LangChain RecursiveUrlLoader SSRF bypass through redirects","headlinePromptVersion":"h1","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":"unknown","epssScore":0.00247,"epssCheckedAt":"2026-11-04T12:08:35.508Z","kevDateAdded":null,"advisoryAliases":["GHSA-mphv-75cg-56wg"],"affectedPackagesSource":"ghsa","affectedPackagesCheckedAt":"2026-10-10T03:50:42.056Z","patchAvailable":true,"disclosureDate":null,"fixReleasedAt":"2026-02-23T19:20:42.642Z","daysToFix":-2,"fixCheckedAt":"2026-10-29T21:40:33.873Z","capecIds":["CAPEC-664"],"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality","integrity"],"aiComponentTargeted":"framework","llmSpecific":false,"classifierConfidence":0.9,"researchCategory":null,"atlasIds":null,"fixes":[{"ecosystem":"npm","name":"@langchain/community","fixedVersion":"1.1.18","matchedVersion":"1.1.18","fixReleasedAt":"2026-02-23T19:20:42.642Z","daysToFix":-2,"match":"ecosystem","source":"tracked","status":"found","checkedAt":"2026-10-29T21:40:33.722Z"}]}}