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Security Vulnerabilities fixed in Thunderbird 140.17 — Mozilla

🗓️ 30 Sep 2026 00:00:00Reported by Mozilla FoundationType 
mozilla
 mozilla
🔗 www.mozilla.org👁 4 Views

Heap buffer overflow in Thunderbird via emails 2GB or larger in size.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
astralinux
AstraLinux
Astra Linux – Vulnerability in Thunderbird
1 Nov 202510:54
–astralinux
circl
Circl
CVE-2026-100756
29 Sep 202620:00
–circl
circl
Circl
CVE-2026-100757
29 Sep 202620:00
–circl
circl
Circl
CVE-2026-100758
29 Sep 202620:00
–circl
circl
Circl
CVE-2026-100759
29 Sep 202620:00
–circl
circl
Circl
CVE-2026-100762
29 Sep 202618:07
–circl
circl
Circl
CVE-2026-100766
29 Sep 202620:00
–circl
circl
Circl
CVE-2026-100767
29 Sep 202620:00
–circl
circl
Circl
CVE-2026-92035
17 Sep 202604:46
–circl
cve
CVE
CVE-2026-100756
29 Sep 202612:35
–cve
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Vulners
Node
mozillathunderbirdRange<140.17

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30 Sep 2026 00:00Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.19.6
EPSS0.0035
SSVC
4