CVE-2026-2764CRITICAL 9.8EPSS p37.2%

CVE-2026-2764CVE-2026-2764

Description

JIT miscompilation, use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.47% probability of exploitation · percentile 37.2% · 2026-06-19T12:03:05Z
Published2026-02-24
Last modified2026-04-13

Underlying weaknesses· 1

CWE-416

References

  1. https://bugzilla.mozilla.org/show_bug.cgi?id=2012608
  2. https://www.mozilla.org/security/advisories/mfsa2026-13/
  3. https://www.mozilla.org/security/advisories/mfsa2026-14/
  4. https://www.mozilla.org/security/advisories/mfsa2026-15/
  5. https://www.mozilla.org/security/advisories/mfsa2026-16/
  6. https://www.mozilla.org/security/advisories/mfsa2026-17/

1

TypeTargetConfidenceTier
WeaknessUse After Freecwe-4160%live

Related by meaning· 6

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