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Security Vulnerabilities fixed in Thunderbird 153.4 — Mozilla

🗓️ 30 Sep 2026 00:00:00Reported by Mozilla FoundationType 
mozilla
 mozilla
🔗 www.mozilla.org👁 3 Views

Heap buffer overflow in Thunderbird when opening emails 2GB or larger.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
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CVE-2026-100756
29 Sep 202620:00
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CVE-2026-100757
29 Sep 202620:00
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circl
Circl
CVE-2026-100758
29 Sep 202620:00
–circl
circl
Circl
CVE-2026-100759
29 Sep 202620:00
–circl
circl
Circl
CVE-2026-100760
29 Sep 202620:00
–circl
circl
Circl
CVE-2026-100762
29 Sep 202618:07
–circl
circl
Circl
CVE-2026-100765
29 Sep 202620:00
–circl
circl
Circl
CVE-2026-100766
29 Sep 202620:00
–circl
cve
CVE
CVE-2026-100756
29 Sep 202612:35
–cve
cve
CVE
CVE-2026-100757
29 Sep 202612:35
–cve
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30 Sep 2026 00:00Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.19.6
EPSS0.0034
SSVC
3