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VULNERABILITIES

CVE-2026-92239 Details

Description

A maliciously constructed IMAP line could cause an out-of-bounds buffer read. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=2060488 [email protected]Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-94/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-95/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-96/ [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-125Out-of-bounds ReadCISA-ADP

Affected Products

ProductVersions
mozilla thunderbird
< 140.16.0
>= 141.0, < 153.3.0
>= 154.0, < 156.0

CPE

  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-92239
NVD Published Date:
Sep 15, 2026
NVD Last Modified:
Sep 24, 2026
Source:
[email protected]
CVE-2026-92239 Details - Not Deferred