High 8.1Published Aug 28, 2026

CVE-2026-82284Quivr Chat Endpoints Missing Ownership Validation

Updated under an hour ago (2026-10-19 08:10 UTC)

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It affects QuivrHQ quivr. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

Quivr versions through 0.0.322 fail to validate chat ownership in the GET /chat/{chat_id}/history, DELETE /chat/{chat_id}, and POST /chat/{chat_id}/question/answer endpoints. Authenticated attackers can read other users' conversation histories including private knowledge base content, delete arbitrary chats, and inject fabricated messages into other users' conversations.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-639
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

QuivrHQ quivr quivrhq:quivr (from the name)	through 0.0.322	CNA record

References

https://github.com/QuivrHQ/quivr/issues/3697issue-tracking
https://github.com/QuivrHQ/quivrproduct
https://github.com/QuivrHQ/quivr/blob/v0.0.322/backend/api/quivr_api/modules/chat/controller/chat_routes.pytechnical-description
https://www.vulncheck.com/advisories/quivr-chat-endpoints-missing-ownership-validationthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.