CVE-2026-3847

Memory safety bugs fixed in Firefox 148.0.2

CVSS 8.8 HIGHEPSS 0.3%CWE-119 CWE-416

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.8EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

10 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Mozilla · Firefox

References

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