{"id":"CVE-2026-82284","title":"Quivr versions through 0.0.322 fail to validate chat ownership in the GET /chat/{chat_id}/history, DELETE /chat/{chat_id}, and POST /chat/{chat_id}/question/answer endpoints","summary":"Quivr versions through 0.0.322 fail to validate chat ownership in the GET /chat/{chat_id}/history, DELETE /chat/{chat_id}, and POST /chat/{chat_id}/question/answer endpoints. Authenticated attackers can read other users' conversation his…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-639"],"published":"2026-08-28","updated":"2026-09-23","sourceUpdated":"2026-09-23T17:17:46.100","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82284","references":[{"url":"https://github.com/QuivrHQ/quivr","label":"disclosure@vulncheck.com"},{"url":"https://github.com/QuivrHQ/quivr/blob/v0.0.322/backend/api/quivr_api/modules/chat/controller/chat_routes.py","label":"disclosure@vulncheck.com"},{"url":"https://github.com/QuivrHQ/quivr/issues/3697","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/quivr-chat-endpoints-missing-ownership-validation","label":"disclosure@vulncheck.com"},{"url":"https://github.com/QuivrHQ/quivr/issues/3697","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00238,"epssPercentile":0.1517,"ingestedAt":"2026-09-23T17:28:14.816Z","slug":"CVE-2026-82284","body":"## Overview\n\nQuivr versions through 0.0.322 fail to validate chat ownership in the GET /chat/{chat_id}/history, DELETE /chat/{chat_id}, and POST /chat/{chat_id}/question/answer endpoints. Authenticated attackers can read other users' conversation histories including private knowledge base content, delete arbitrary chats, and inject fabricated messages into other users' conversations.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}