9.1

CVE-2026-84639

Uninitialized memory in MIME parsing

Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Mozilla ≫ Thunderbird Version < 140.15.0
Mozilla ≫ Thunderbird Version >= 141.0 < 153.2.0
Mozilla ≫ Thunderbird Version >= 154.0 < 155.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.34% 0.272
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
CISA-ADP 9.1 3.9 5.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CWE-457 Use of Uninitialized Variable

The code uses a variable that has not been initialized, leading to unpredictable or unintended results.

https://bugzilla.mozilla.org/show_bug.cgi?id=2061087
Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-86/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-88/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-87/
Vendor Advisory