CVE-2026-74869

HIGH 7.7

stoatchat before 0.15.0 Missing Authorization via Subscribe

CVSS Score

7.7

EPSS Score

0.0%

EPSS Percentile

0th

stoatchat before 0.15.0 contains a missing authorization vulnerability in the Subscribe message handler that allows authenticated attackers to enumerate members and monitor profile updates of private servers without membership. Attackers can subscribe to any server's member-update topic by sending a Subscribe message with an arbitrary server ID, receiving live UserUpdate events including display names, avatars, and status changes for members they should not have access to.

CWE	CWE-862
Vendor	stoatchat
Product	stoatchat
Published	Aug 17, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

stoatchat / stoatchat

0 < 0.15.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/stoatchat/stoatchat/security/advisories/GHSA-jj3j-9qr7-jgfc vulncheck.com: https://www.vulncheck.com/advisories/stoatchat-before-missing-authorization-via-subscribe

Credits

🔍 DonAsako