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HIGH

Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1

Published Apr 28, 2026

Description

Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. 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 150.0.1, Firefox ESR 140.10.1, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.

Affected products

Remediation

Red Hat statement

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

Weaknesses (3)

CWE-119

Buffer Overflow

CWE-416

Use After Free

CWE-787

Out-of-bounds Write

References (36)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mozilla
Published Apr 28, 2026
Updated Jul 15, 2026
Reserved Apr 28, 2026
Link CVE-2026-7322
CISA Vulnrichment
Updated Apr 30, 2026
NVD
Status Modified
Modified Jul 15, 2026
Link CVE-2026-7322
Red Hat
Severity Important
Public date Apr 28, 2026
Links CVE-2026-7322 - Bugzilla
ENISA EUVD
Assigner mozilla
Published Apr 28, 2026
Updated Jul 15, 2026
Exploited since n/a
Link EUVD-2026-26059
EUVD-2026-26059