CVE-2026-4729
Memory safety bugs present in Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that w
CVSS
9.8
Crítico
EPSS
0.3%
p26
KEV
—
Exploit Today
8
0-100
Publicado: 24 mar 2026 · Última mod.: 15 jul 2026 · CWE-120 · CWE-825
0.3%EPSS · 30 días0.3%
2026-08-172026-09-14
Memory safety bugs present in Firefox 148 and Thunderbird 148. 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 and Thunderbird 149.
- bugzilla.mozilla.orghttps://bugzilla.mozilla.org/buglist.cgi?bug_id=1944033%2C1997282%2C2009213%2C2011412%2C2021925%2C2022034
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-20/
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-23/
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-4729
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2450745
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4729.json
CVECVSSEPSSKEVRExplotTítuloVis.
CVE-2026-920438.8 ALT—
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———Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.6hCVE-2026-920128.8 ALT—
———Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.6hCVE-2026-920118.8 ALT—
———Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.6h