What is CVE-2026-100812?

CVE-2026-100812 is a medium-severity vulnerability, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-09-29.

How severe is CVE-2026-100812?

Medium severity. CVSS v3 base score is 6.5 out of 10.

CVE-2026-100812

CVE-2026-100812

Denial-of-service in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

Published 2026-09-29 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

bugzilla.mozilla.org/show_bug.cgi
www.mozilla.org/security/advisories/mfsa2026-100/
www.mozilla.org/security/advisories/mfsa2026-97/
www.mozilla.org/security/advisories/mfsa2026-101/
www.mozilla.org/security/advisories/mfsa2026-103/

Frequently asked questions

What is CVE-2026-100812?: CVE-2026-100812 is a medium-severity vulnerability, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-09-29.
How severe is CVE-2026-100812?: Medium severity. CVSS v3 base score is 6.5 out of 10.