CVE-2026-82280

high

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.

References

https://www.vulncheck.com/advisories/quivr-prompt-endpoints-missing-ownership-validation

https://github.com/QuivrHQ/quivr/issues/3698

https://github.com/QuivrHQ/quivr/blob/v0.0.322/backend/api/quivr_api/modules/prompt/controller/prompt_routes.py

https://github.com/QuivrHQ/quivr

Details

Source: Mitre, NVD

Published: 2026-08-28

Updated: 2026-08-28

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:C/A:N

Severity: High

CVSS v3

Base Score: 7.1

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Severity: High

CVSS v4

Base Score: 7.1

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Severity: High