CVE-2026-82280: Authorization Bypass Through User-Controlled Key in QuivrHQ quivr
Description
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.
CVSS v4.0
Score 7.1high
Affected software
QuivrHQ
quivr
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-82280 is an authorization bypass vulnerability in Quivr (up to version 0.0.322) where the application fails to validate ownership in prompt endpoints. This flaw allows authenticated users with limited privileges to modify any prompt by specifying its identifier. Specifically, attackers who have read-only access to shared brains can enumerate prompt identifiers and overwrite system prompts, thereby affecting all users associated with that brain.
Potential Impact
The vulnerability enables unauthorized modification of prompts by authenticated users, potentially leading to unauthorized changes in system prompts that affect all users of a shared brain. This could disrupt normal operations or cause unintended behavior in the application for multiple users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-28T11:12:50.590Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a91e416acd9273b4942e918
Added to database: 08/28/2026, 19:40:06 UTC
Last enriched: 09/25/2026, 02:44:01 UTC
Last updated: 10/12/2026, 06:48:19 UTC
Views: 67
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