CVE-2026-5735 is a vulnerability in Mozilla Firefox
Published on April 7, 2026
Memory safety bugs fixed in Firefox 149.0.2 and Thunderbird 149.0.2
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 affects Firefox < 149.0.2.
Products Associated with CVE-2026-5735
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Affected Versions
Mozilla Firefox:- Version unspecified and below 149.0.2 is affected.