CVE-2026-3847HIGH 8.8EPSS p22.2%

CVE-2026-3847CVE-2026-3847

Description

Memory safety bugs present in Firefox 148.0.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148.0.2.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS0.31% probability of exploitation · percentile 22.2% · 2026-06-19T12:03:05Z
Published2026-03-10
Last modified2026-04-13

Underlying weaknesses· 2

CWE-119CWE-416

References

  1. https://bugzilla.mozilla.org/buglist.cgi?bug_id=2017513%2C2017622%2C2019341
  2. https://www.mozilla.org/security/advisories/mfsa2026-19/

2

TypeTargetConfidenceTier
WeaknessImproper Restriction of Operations within the Bounds of a Memory Buffercwe-1190%live
WeaknessUse After Freecwe-4160%live

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