9.8 Critical

CVE-2026-16411 Memory safety bugs present in Thunderbird 152

Description

Memory safety bugs present in Thunderbird 152. 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 153 and Thunderbird 153.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 153	earliest → < 153	153
Thunderbird 153	earliest → < 153	153

References

Moderate-severity memory safety bugs fixed in Thunderbird 153 bugzilla.mozilla.org
Low-severity memory safety bugs fixed in Thunderbird 153 bugzilla.mozilla.org
High-severity memory safety bugs fixed in Thunderbird 153 bugzilla.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org

Timeline

Published July 21, 2026
Last modified October 21, 2026

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Track this CVE

CVE-2026-16411 Memory safety bugs present in Thunderbird 152

Description

Affected products and versions

References

Timeline

Other CVEs of Firefox