CVE-2026-2768CRITICAL 10.0EPSS p29.3%

CVE-2026-2768CVE-2026-2768

mozilla / firefox

Description

Sandbox escape in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Scoring

CVSS 3.110.0 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS0.37% probability of exploitation · percentile 29.3% · 2026-08-03T12:00:16Z
Published2026-02-24
Last modified2026-07-15

Underlying weaknesses· 2

CWE-284CWE-693

References

  1. https://bugzilla.mozilla.org/show_bug.cgi?id=2014101
  2. https://www.mozilla.org/security/advisories/mfsa2026-13/
  3. https://www.mozilla.org/security/advisories/mfsa2026-15/
  4. https://www.mozilla.org/security/advisories/mfsa2026-16/
  5. https://www.mozilla.org/security/advisories/mfsa2026-17/

2

TypeTargetConfidenceTier
WeaknessImproper Access Controlcwe-2840%live
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.