{"id":"CVE-2026-51882","aliases":["EUVD-2026-91123","GHSA-p52p-3gpf-v5f9"],"status":"published","title":"The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable...","description":"The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable to path traversal. An attacker can write files to arbitrary locations outside the `openai_files` directory by crafting malicious filenames.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00509,"percentile":0.43893,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2026-10-01T00:00:00Z","modified":"2026-10-07T15:31:33Z","references":[{"url":"https://github.com/chatchat-space/Langchain-Chatchat/issues/5468","tags":["exploit"]},{"url":"https://gist.github.com/Ro1ME/f80ac458836b59adb9c6ceff3993f7f3","tags":["exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-51882"},{"url":"https://github.com/advisories/GHSA-p52p-3gpf-v5f9"}],"sources":{"cve":[{"id":"CVE-2026-51882","description":"The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable to path traversal. An attacker can write files to arbitrary locations outside the `openai_files` directory by crafting malicious filenames.","status":"published","published":"2026-10-01T00:00:00Z","modified":"2026-10-07T14:52:16.785Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T13:39:50.160666Z"}],"euvd":[{"id":"EUVD-2026-91123","description":"The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable to path traversal. An attacker can write files to arbitrary locations outside the `openai_files` directory by crafting malicious filenames.","status":"published","published":"2026-10-01T00:00:00Z","modified":"2026-10-07T14:52:16Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T17:27:35.164729Z"}],"ghsa":[{"id":"GHSA-p52p-3gpf-v5f9","title":"The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable...","description":"The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable to path traversal. An attacker can write files to arbitrary locations outside the `openai_files` directory by crafting malicious filenames.","status":"published","published":"2026-10-02T00:31:30Z","modified":"2026-10-07T15:31:33Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:12:54.703562Z"}],"nvd":[{"id":"CVE-2026-51882","description":"The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable to path traversal. An attacker can write files to arbitrary locations outside the `openai_files` directory by crafting malicious filenames.","status":"published","published":"2026-10-01T22:17:03.003Z","modified":"2026-10-07T15:17:22.24Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:53.41762Z"}]}}