FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

Mozilla -- Memory safety bugs

Affected packages
	firefox	<	149.0.2,2
	firefox-esr	<	140.9.1
	thunderbird	<	140.9.1

Details

VuXML ID	33e56419-33fb-11f1-8ac1-b42e991fc52e
Discovery	2026-04-07
Entry	2026-04-09

https://bugzilla.mozilla.org/buglist.cgi?bug_id=2022369%2C2023026%2C2023545%2C2023555%2C2023958%2C2025422%2C2025468%2C2025492%2C2025505 reports:

Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, 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.

[source]

References

CVE Name	CVE-2026-5734
URL	https://cveawg.mitre.org/api/cve/CVE-2026-5734