CVE-2026-82284CWE-639

CVE-2026-82284

High · published August 29, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
21.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
8.6 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00303 · 21.8th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-08-29T00:20Z
References (5)
https://github.com/QuivrHQ/quivr · [email protected]https://github.com/QuivrHQ/quivr/blob/v0.0.322/backend/api/quivr_api/modules/chat/controller/chat_routes.py · [email protected]https://github.com/QuivrHQ/quivr/issues/3697 · [email protected]https://www.vulncheck.com/advisories/quivr-chat-endpoints-missing-ownership-validation · [email protected]https://github.com/QuivrHQ/quivr/issues/3697 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 30 AUG 16:19Z
    EPSS moved — → 0%
    epss
  • 28 AUG 16:19Z
    Quivr Chat Endpoints Missing Ownership Validation
    cvelistv5