CVE-2026-5735

Memory safety bugs fixed in Firefox 149.0.2 and Thunderbird 149.0.2

CVSS 8.1 HIGHEPSS 0.3%CWE-125 CWE-787

Vexday Risk Score

21Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 8.1EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

07 abr 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

Memory safety bugs present in Firefox 149.0.1 and Thunderbird 149.0.1. 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 149.0.2 and Thunderbird 149.0.2.

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

Productos afectados

Mozilla · Firefox Mozilla · Thunderbird

Referencias

https://access.redhat.com/security/cve/CVE-2026-5735 https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025475%2C2025477 https://bugzilla.redhat.com/show_bug.cgi?id=2455904 https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5735.json https://www.mozilla.org/security/advisories/mfsa2026-25/https://www.mozilla.org/security/advisories/mfsa2026-28/