Vulnerability · Published Sep 26, 2026 · Assigned by VulnCheck
CVE-2026-100675stoatchat before 0.15.5 Denial of Service via mass mentions
Medium 6.5
In plain English
A medium-severity security flaw in stoatchat from stoatchat. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 68.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
stoatchat versions before 0.15.5 contain a denial of service vulnerability in the acknowledgement worker that processes mass mention messages. Authenticated users can send five crafted role-mention messages to terminate all acknowledgement workers, disabling push notifications and mention badges deployment-wide until the API process restarts.
Affected products (as reported)
Weakness: CWE-248 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- GitHub Security Advisory (GHSA-5gq6-v4cf-3qq8) vendor-advisory
- VulnCheck Advisory: stoatchat before 0.15.5 Denial of Service via mass mentions third-party-advisory