All vulnerabilities
CVE-2026-100675GHSA-5gq6-v4cf-3qq8

stoatchat before 0.15.5 Denial of Service via mass mentions

stoatchat stoatchat
Open in ThreatlineRecord JSON
CVSS
7.1High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 28 Sep 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.31%Chance of exploitation activity in the next 30 days, higher than 22% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in0.15.5Fixed versionCVE List
Published26 Sep 2026Updated 28 Sep 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • stoatchataffected: all versions before 0.15.5CVE List
  • stoatchatunaffected: 0.15.5CVE List

References 2