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Security Vulnerabilities fixed in Thunderbird 158 — Mozilla

🗓️ 13 Oct 2026 00:00:00Reported by Mozilla FoundationType 
mozilla
 mozilla
🔗 www.mozilla.org👁 3 Views

Several buffer-growth sites in libmime performed size arithmetic in 32-bit types without overflow checks. On a sufficiently large message the growth guard could fail open, or the buffer could be reallocated smaller than required, and a subsequent ...

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CVE-2026-109704
13 Oct 202612:52
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CVE-2026-109705
13 Oct 202612:53
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CVE-2026-109706
13 Oct 202612:53
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CVE-2026-109707
13 Oct 202612:54
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CVE-2026-109708
13 Oct 202612:55
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CVE-2026-109709
13 Oct 202612:55
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CVE-2026-110247
13 Oct 202618:39
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CVE-2026-110249
13 Oct 202618:40
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cve
CVE
CVE-2026-109704
13 Oct 202612:29
–cve
cve
CVE
CVE-2026-109705
13 Oct 202612:29
–cve
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13 Oct 2026 00:00Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.18.8
SSVC
3