CVE-2026-0892

CRITICAL 9.8CVE-2026-0892 · Published 13/01/2026 · updated 17/06/2026

Package	Affected versions	Patched versions
firefox mozilla	`< 147.0`	`147.0`
thunderbird mozilla	`< 147.0`	`147.0`

Description

Memory safety bugs present in Firefox 146 and Thunderbird 146. 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 147 and Thunderbird 147.

References

bugzilla.mozilla.org/buglist.cgi · Broken Link
mozilla.org/security/advisories/mfsa2026-01 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-04 · Vendor Advisory

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