---
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: 0.00303
epssPercentile: 0.20435
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'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.