CVE-2026-82284 QuivrHQ CVE debrief

Who should care

Defenders responsible for Quivr deployments, particularly those using versions through 0.0.322, should assess exposure and verify chat endpoint ownership validation. This includes reviewing and updating Quivr to a version with patched chat endpoints if available, and checking relevant monitoring, detection, and logs for exposed assets that need extra review. Additionally, defenders should prioritize verifying chat endpoint ownership validation in Quivr and

Why it matters

CVE-2026-82284 is a high-severity vulnerability in Quivr chat endpoints that allows authenticated attackers to access and manipulate chat content. Defenders should prioritize verifying chat endpoint ownership validation in Quivr deployments and assessing exposure in their environment.

• Authenticated attackers can read other users' conversation histories, including private knowledge base content.
• Authenticated attackers can delete arbitrary chats.
• Authenticated attackers can inject fabricated messages into other users' conversations.
• Verification of chat endpoint ownership validation is required to prevent these impacts.

Technical summary

Quivr versions through 0.0.322 have a vulnerability in chat endpoints, allowing authenticated attackers to read other users' conversation histories, delete arbitrary chats, and inject fabricated messages. The vulnerability is caused by a lack of ownership validation in the GET /chat/{chat_id}/history, DELETE /chat/{chat_id}, and POST /chat/{chat_id}/question/answer endpoints. Defenders should prioritize verifying chat endpoint ownership validation in Quivr deployments and assessing exposure in their environment. The vulnerability has a high severity with a CVSS score of 8.6.

Defensive priority

Defenders should prioritize verifying chat endpoint ownership validation in Quivr versions through 0.0.322 and assessing exposure in their deployments.

Recommended defensive actions

• Verify chat endpoint ownership validation in Quivr deployments
• Assess exposure of Quivr versions through 0.0.322 in your environment
• Review and update Quivr to a version with patched chat endpoints if available
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in Quivr versions through 0.0.322, including affected endpoints and potential impacts. The vulnerability allows authenticated attackers to access and manipulate chat content. Defenders should verify chat endpoint ownership validation and assess exposure in their environment. Evidence is limited to public CVE and NVD information, and further verification is required to confirm affected scope and severity.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.