CVE-2026-82284Public exploitNetwork attack vector

Cross-tenant chat disclosure and tampering via unchecked identifiers

Published Aug 28, 2026 · Updated Aug 28, 2026

Broken object-level authorization in Quivr through 0.0.322 allows remote authenticated users to read, alter, or delete other users' chats. Three chat routes accept a caller-supplied chat_id and query or mutate by that identifier without binding it to the authenticated user's ID. Any regular account with a target chat UUID can retrieve histories containing private knowledge-base content, delete the chat, or persist fabricated question-and-answer pairs.

CVSS severity8.6
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken object-level authorization in Quivr through 0.0.322 allows remote authenticated users to read, alter, or delete other users' chats. Three chat routes accept a caller-supplied chat_id and query or mutate by that identifier without binding it to the authenticated user's ID. Any regular account with a target chat UUID can retrieve histories containing private knowledge-base content, delete the chat, or persist fabricated question-and-answer pairs.

The record

CVE
CVE-2026-82284
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
Quivr
Product
Quivr
Classifications
CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=0.0.322

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Quivr · Quivrversion=0 <=0.0.322

Published CVSS scores

8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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