{"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","cve.org","exploit-available"],"epss":0.00426,"epssPercentile":0.36718,"ingestedAt":"2026-09-23T17:28:14.816Z","vendor":"QuivrHQ","product":"quivr","affected":["quivr <= 0.0.322"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-08-28T20:23:07.580394Z"},"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":"midnight","depthScore":57,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":210237,"id":"CVE-2026-82284","ts":1790264816305,"field":"exploit_available","old":"false","new":"true"}]}