Vulnerability record · CVE-2026-82280 · published 28 August 2026

CVE-2026-82280: Insecure direct object reference vulnerability

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.

7.1 CVSS 4.0 High EPSS 0.25% · top 85.2% CWE-639 · Insecure direct object reference Deferred

7.1CVSS 4.0 base score

0.25%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

23 Sep 2026Last modified by NVD

Description

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
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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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.4CVE-2026-55255Langflow IDOR in responses endpoint allows cross-user flow executionLangflow before 1.9.1 has an insecure direct object reference in the /api/v1/responses endpoint. An authenticated attacker can supply another user's …KEVEPSS 0.89%analysed23 Jun 2026

Source: NIST National Vulnerability Database (record CVE-2026-82280), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.