CVE-2026-82284
CVE-2026-82284
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Weakness classification (CWE)
References
- github.com/QuivrHQ/quivr/issues/3697 (issue-tracking)
- github.com/QuivrHQ/quivr (product)
- github.com/QuivrHQ/quivr/blob/v0.0.322/backend/api/quivr_api/modules/chat/contr… (technical-description)
- www.vulncheck.com/advisories/quivr-chat-endpoints-missing-ownership-validation (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82284?
- CVE-2026-82284 is a high-severity vulnerability, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-08-28.
- How severe is CVE-2026-82284?
- High severity. CVSS v3 base score is 8.1 out of 10.