stoatchat before 0.15.0 contains a missing authorization vulnerability in the Subscribe message handler that allows authenticated attackers to… (CVE-2026-74869)
stoatchat versions before 0.15.0 have a missing authorization vulnerability in the Subscribe message handler. This flaw allows authenticated attackers to subscribe to member-update topics of private servers without being members. As a result, attackers can enumerate members and monitor profile updates such as display names, avatars, and status changes that they should not have access to.
AI Analysis
Technical Summary
The vulnerability in stoatchat before version 0.15.0 is due to missing authorization checks in the Subscribe message handler. Authenticated users can send a Subscribe message with an arbitrary server ID to subscribe to any server's member-update topic. This enables them to receive live UserUpdate events containing sensitive information about server members, including display names, avatars, and status changes, even if they are not members of the server. This issue is tracked as CVE-2026-74869 and is classified under CWE-862 (Missing Authorization).
Potential Impact
Authenticated attackers can bypass intended access controls to enumerate members of private servers and monitor their profile updates in real time. This leads to a confidentiality breach of user information such as display names, avatars, and status changes. The vulnerability does not affect integrity or availability but has a high impact on confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user permissions where possible and monitor for suspicious subscription activity. Avoid exposing sensitive member-update topics to unauthorized users.
stoatchat before 0.15.0 contains a missing authorization vulnerability in the Subscribe message handler that allows authenticated attackers to… (CVE-2026-74869)
Description
stoatchat versions before 0.15.0 have a missing authorization vulnerability in the Subscribe message handler. This flaw allows authenticated attackers to subscribe to member-update topics of private servers without being members. As a result, attackers can enumerate members and monitor profile updates such as display names, avatars, and status changes that they should not have access to.
CVSS v3.1
Score 7.7high
Affected software
pkg:github/stoatchat/stoatchatRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in stoatchat before version 0.15.0 is due to missing authorization checks in the Subscribe message handler. Authenticated users can send a Subscribe message with an arbitrary server ID to subscribe to any server's member-update topic. This enables them to receive live UserUpdate events containing sensitive information about server members, including display names, avatars, and status changes, even if they are not members of the server. This issue is tracked as CVE-2026-74869 and is classified under CWE-862 (Missing Authorization).
Potential Impact
Authenticated attackers can bypass intended access controls to enumerate members of private servers and monitor their profile updates in real time. This leads to a confidentiality breach of user information such as display names, avatars, and status changes. The vulnerability does not affect integrity or availability but has a high impact on confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user permissions where possible and monitor for suspicious subscription activity. Avoid exposing sensitive member-update topics to unauthorized users.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5cwg-5wjq-gqw2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-74869"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a83335bbf8831d5392a6431
Added to database: 08/17/2026, 16:14:19 UTC
Last enriched: 08/17/2026, 16:29:43 UTC
Last updated: 08/17/2026, 21:58:34 UTC
Views: 4
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