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.

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 2026-09-26.

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

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Stoatchat

Weakness classification (CWE)

CWE-248

References

github.com/stoatchat/stoatchat/security/advisories/GHSA-5gq6-v4cf-3qq8 (vendor-advisory)
www.vulncheck.com/advisories/stoatchat-before-0.15.5-denial-of-service-via-mass… (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.