CVE-2026-8975

HIGH

Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151

Title source: cna
STIX 2.1

Description

Memory safety bugs present in Thunderbird 140.10 and Thunderbird 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

References (6)

Core 6

Scores

CVSS v3 8.8
EPSS 0.0004
EPSS Percentile 13.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-119
Status published
Products (9)
mozilla/firefox < 115.36.0
mozilla/firefox < 151.0.0
Mozilla/Firefox 115.36 - 115.*
Mozilla/Firefox 140.11 - 140.*
Mozilla/Firefox 151
mozilla/thunderbird < 140.11
mozilla/thunderbird < 151.0.0
Mozilla/Thunderbird 140.11 - 140.*
Mozilla/Thunderbird 151
Published May 19, 2026
Tracked Since May 19, 2026