{"api_version":"1","generated_at":"2026-10-02T22:47:55+00:00","cve":"CVE-2026-51883","urls":{"html":"https://cve.report/CVE-2026-51883","api":"https://cve.report/api/cve/CVE-2026-51883.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-51883","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-51883"},"summary":{"title":"CVE-2026-51883","description":"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.","state":"PUBLISHED","assigner":"mitre","published_at":"2026-10-01 22:17:03","updated_at":"2026-10-02 18:47:49"},"problem_types":["n/a"],"metrics":[],"references":[{"url":"https://github.com/chatchat-space/Langchain-Chatchat/issues/5467","name":"https://github.com/chatchat-space/Langchain-Chatchat/issues/5467","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://gist.github.com/Ro1ME/30f5139a2920bf7075299a33eb1690f2","name":"https://gist.github.com/Ro1ME/30f5139a2920bf7075299a33eb1690f2","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-51883","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-51883","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"n/a","product":"n/a","version":"affected n/a","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"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."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2026-10-01T21:35:55.173Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"url":"https://github.com/chatchat-space/Langchain-Chatchat/issues/5467"},{"url":"https://gist.github.com/Ro1ME/30f5139a2920bf7075299a33eb1690f2"}]}},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2026-51883","datePublished":"2026-10-01T00:00:00.000Z","dateReserved":"2026-06-08T00:00:00.000Z","dateUpdated":"2026-10-01T21:35:55.173Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-01 22:17:03","lastModifiedDate":"2026-10-02 18:47:49","problem_types":["n/a"],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"51883","Ordinal":"1","Title":"CVE-2026-51883","CVE":"CVE-2026-51883","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"51883","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"CVE-2026-51883"}]}}}