Vulnerability in Stoatchat
CVE-2026-100675
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (31.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
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)
Frequently asked questions
- What is CVE-2026-100675?
- CVE-2026-100675 is a medium-severity vulnerability in Stoatchat, classified under CWE-248. CVSS score: 6.5/10. Published 2026-09-26.
- How severe is CVE-2026-100675?
- Medium severity. CVSS v3 base score is 6.5 out of 10.