CVE-2026-4729 in Mozilla Firefoxinfo

Summary

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 affects Firefox < 149 and Thunderbird < 149.

Responsible

mozilla

Reservation

03/24/2026

Disclosure

03/24/2026

Entries

VulDB provides additional information and datapoints for this CVE:

IDVulnerabilityCWEExpCouCVE
352760Mozilla Firefox memory corruption119Not definedOfficial fixCVE-2026-4729

Description

CPE

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