What’s Vulnerable › Vulnerabilities

CVE-2026-82280: Quivr Prompt Endpoints Missing Ownership Validation

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-09-23
• Weakness: CWE-639

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.

Affected products

• QuivrHQ quivr: through 0.0.322

References

• 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://github.com/QuivrHQ/quivr/issues/3698
• https://www.vulncheck.com/advisories/quivr-prompt-endpoints-missing-ownership-validation
• https://github.com/The-Vibe-Company/Quivr/issues/3698

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