Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mozilla Firefox
149.0.2 to ≤ *unaffected
Mozilla Thunderbird
149.0.2 to ≤ *unaffected
References
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=2025475%2C2025477 ↗
- https://www.mozilla.org/security/advisories/mfsa2026-25/ ↗
- https://www.mozilla.org/security/advisories/mfsa2026-28/ ↗
- https://access.redhat.com/security/cve/CVE-2026-5735 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2455904 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5735.json ↗