CVE-2026-92238
CRITICALCVSS 9.8Description
A maliciously constructed mail header could lead to multiple fields being parsed as one, or potential memory safety violations. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Timeline
Published:September 15th, 2026 8:19 PM
Last modified:September 24th, 2026 2:15 PM
CVSS Scoring
CVSS v3: 9.8 (CRITICAL)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
From NVD CPE configuration data
Vendors
mozilla
Products
thunderbird
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
Source: NIST NVD · Data may lag official sources by up to one minute