{"schema":"threatline.record/2","record":{"id":"CVE-2026-75128","aliases":[],"summary":"Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint","details":"Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without authentication, leaving the always-registered shell tool callable. Remote attackers can send a single request naming the shell tool to execute arbitrary OS commands as the server user (root in the shipped Docker image).","categories":["Unclassified"],"product":"Langchain-Chatchat","vendor":"chatchat-space","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-75128","source_modified_at":"2026-10-20T14:34:07.343Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Langchain-Chatchat","vendor":"chatchat-space","versions":[{"version":"0","lessThanOrEqual":"0.3.1.3","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":9.3,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00522,"percentile":0.43503,"score_date":"2026-10-23"},"published_at":"2026-10-20T00:46:08.977Z","modified_at":"2026-10-20T14:34:07.343Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-75128","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-20T14:34:07.343Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-75128","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://www.lasso.security/vulnerability-database/cve-2026-75128","tags":["technical-description","exploit"]},{"source":"CVE List","url":"https://github.com/chatchat-space/Langchain-Chatchat/blob/a6a9193b5002061719f0eee62c6310bd5b1b7f63/libs/chatchat-server/chatchat/server/api_server/tool_routes.py#L33","tags":["technical-description"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/langchain-chatchat-through-0.3.1.3-unauthenticated-rce-via-tools-call-endpoint","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"yes","technical_impact":"total","assessed_at":"2026-10-20T14:33:41.797170Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-20T14:34:07.343Z","content_hash":"a7f82f8d038254a337305ef47d4e4766dab3ac68196e7d8703f583d5c304ac6b"}}