---
id: CVE-2026-82280
title: >-
  Quivr through 0.0.322 fails to validate ownership in prompt endpoints,
  allowing authenticated users to modify any prompt by identifier
summary: >-
  Quivr through 0.0.322 fails to validate ownership in prompt endpoints,
  allowing authenticated users to modify any prompt by identifier. Attackers
  with read-only access to shared brains can read exposed prompt identifiers and
  overwrite sy…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N'
cwe:
  - CWE-639
published: '2026-08-28'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:46.060'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82280'
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/prompt/controller/prompt_routes.py
    label: disclosure@vulncheck.com
  - url: 'https://github.com/QuivrHQ/quivr/issues/3698'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/quivr-prompt-endpoints-missing-ownership-validation
    label: disclosure@vulncheck.com
  - url: 'https://github.com/The-Vibe-Company/Quivr/issues/3698'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00251
epssPercentile: 0.14659
ingestedAt: '2026-09-23T17:28:14.815Z'
vendor: QuivrHQ
product: quivr
affected:
  - quivr <= 0.0.322
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-31T18:46:49.905037Z'
---

## Overview

Quivr through 0.0.322 fails to validate ownership in prompt endpoints, allowing authenticated users to modify any prompt by identifier. Attackers with read-only access to shared brains can read exposed prompt identifiers and overwrite system prompts affecting all brain users.

## Remediation

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