CVE-2026-82280

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 system prompts affecting all brain users.

Affected Software

Weaknesses

• CWE-639: Authorization Bypass Through User-Controlled Key

References

• https://github.com/QuivrHQ/quivr/issues/3698
• https://github.com/QuivrHQ/quivr
• https://github.com/QuivrHQ/quivr/blob/v0.0.322/backend/api/quivr_api/modules/prompt/controller/prompt_routes.py
• https://www.vulncheck.com/advisories/quivr-prompt-endpoints-missing-ownership-validation

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