9.8

CVE-2026-84143

Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15

Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Mozilla ≫ Firefox Version < 140.15.0
Mozilla ≫ Firefox Version >= 141.0.0 < 153.2.0
Mozilla ≫ Firefox Version >= 154.0.0 < 155.0.0
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 0.17% 0.062
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA-ADP 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

https://www.mozilla.org/security/advisories/mfsa2026-82/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-85/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-84/
Vendor Advisory
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2048793%2C2054645%2C2057114%2C2059109%2C2061287
Issue Tracking
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2054631%2C2054657%2C2055007%2C2055681%2C2057107%2C2058087%2C2058088%2C2058090%2C2058095%2C2058101%2C2059183%2C2059185%2C2061301%2C2061325
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=2057108
Issue Tracking
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