{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-51883", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-10-01T21:35:55.173Z", "dateReserved": "2026-06-08T00:00:00.000Z", "datePublished": "2026-10-01T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-10-01T21:35:55.173Z"}, "descriptions": [{"lang": "en", "value": "The knowledge base creation and document upload interfaces in Langchain-Chatchat 0.3.0;0.3.1 is vulnerable to path traversal. An attacker can inject path traversal sequences (such as `..\\`) into the `knowledge_base_name` parameter to write knowledge base content to arbitrary locations outside the configured knowledge base root directory."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/chatchat-space/Langchain-Chatchat/issues/5467"}, {"url": "https://gist.github.com/Ro1ME/30f5139a2920bf7075299a33eb1690f2"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}}, "dataVersion": "5.2"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The knowledge base creation and document upload interfaces in Langchain-Chatchat 0.3.0;0.3.1 is vulnerable to path traversal. An attacker can inject path traversal sequences (such as `..\\`) into the `knowledge_base_name` parameter to write knowledge base content to arbitrary locations outside the configured knowledge base root directory."}], "id": "CVE-2026-51883", "lastModified": "2026-10-01T22:17:03.127", "metrics": {}, "published": "2026-10-01T22:17:03.127", "references": [{"source": "cve@mitre.org", "url": "https://gist.github.com/Ro1ME/30f5139a2920bf7075299a33eb1690f2"}, {"source": "cve@mitre.org", "url": "https://github.com/chatchat-space/Langchain-Chatchat/issues/5467"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.3.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.3.1"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "langchain-chatchat", "vendor": "chatchat-space"}], "created": "2026-10-01T23:00:17.927127+00:00", "title": "Path Traversal in Langchain\u2011Chatchat Knowledge Base Creation and Upload", "updated": "2026-10-01T23:30:14.989009+00:00", "vendors": ["chatchat-space", "chatchat-space$PRODUCT$langchain-chatchat"], "weaknesses": ["CWE-22"]}