Vulnerability · Published Aug 17, 2026 · Assigned by VulnCheck

CVE-2026-74869stoatchat before 0.15.0 Missing Authorization via Subscribe

High 7.7

In plain English

A high-severity missing authorization in stoatchat from stoatchat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)7.7High

Exploit odds (30 days)0.4%top 70.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
stoatchat	stoatchat	0 – before 0.15.0

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-jj3j-9qr7-jgfc) vendor-advisory
VulnCheck Advisory: stoatchat before 0.15.0 Missing Authorization via Subscribe third-party-advisory