CVE-2026-0881CRITICAL 10.0EPSS p29.1%

CVE-2026-0881CVE-2026-0881

Description

Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.

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 29.1% · 2026-06-19T12:03:05Z
Published2026-01-13
Last modified2026-04-13

Underlying weaknesses· 2

CWE-284CWE-693

References

  1. https://bugzilla.mozilla.org/show_bug.cgi?id=2005845
  2. https://www.mozilla.org/security/advisories/mfsa2026-01/
  3. https://www.mozilla.org/security/advisories/mfsa2026-04/

2

TypeTargetConfidenceTier
WeaknessImproper Access Controlcwe-2840%live
WeaknessProtection Mechanism Failurecwe-6930%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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