{"id":"CVE-2026-82284","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-82284","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…","details":"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 histories including private knowledge base content, delete arbitrary chats, and inject fabricated messages into other users' conversations.","published":"2026-08-28T20:20:19.823","modified":"2026-08-28T20:20:19.823","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/QuivrHQ/quivr"},{"type":"WEB","url":"https://github.com/QuivrHQ/quivr/blob/v0.0.322/backend/api/quivr_api/modules/chat/controller/chat_routes.py"},{"type":"WEB","url":"https://github.com/QuivrHQ/quivr/issues/3697"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/quivr-chat-endpoints-missing-ownership-validation"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-28T20:20:19.823"}}