CVE-2026-8962HIGH 8.1EPSS p30.0%

CVE-2026-8962CVE-2026-8962

mozilla / firefox

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS0.37% probability of exploitation · percentile 30.0% · 2026-08-03T12:00:16Z
Published2026-05-19
Last modified2026-07-23

Underlying weaknesses· 1

CWE-693

References

  1. https://bugzilla.mozilla.org/show_bug.cgi?id=2004804
  2. https://www.mozilla.org/security/advisories/mfsa2026-46/
  3. https://www.mozilla.org/security/advisories/mfsa2026-48/
  4. https://www.mozilla.org/security/advisories/mfsa2026-50/
  5. https://www.mozilla.org/security/advisories/mfsa2026-51/

1

TypeTargetConfidenceTier
WeaknessProtection Mechanism Failurecwe-6930%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.