CVE-2026-3847

Memory safety bugs fixed in Firefox 148.0.2

State: Published
Severity: 8.8 High
Published: Mar 10, 2026
Updated: Apr 13, 2026
Reserved: Mar 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-416 Use After Free

Affected Products

Product	Versions
FirefoxMozilla	148.0.2 and laterNot affected

References

Memory safety bugs fixed in Firefox 148.0.2
https://www.mozilla.org/security/advisories/mfsa2026-19/

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