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VULNERABILITIES

CVE-2026-16361 Details

Description

Memory safety bugs present in Thunderbird ESR 140.12. 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 ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518 [email protected]Broken Link
https://www.mozilla.org/security/advisories/mfsa2026-69/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-70/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-72/ [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferCISA-ADP

Affected Products

ProductVersions
mozilla firefox
< 115.38.0
>= 128.1.0, < 140.13.0

CPE

  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*

Remediation

  • No remediation found in references.
mozilla thunderbird
< 140.13.0

CPE

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

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-16361
NVD Published Date:
Jul 21, 2026
NVD Last Modified:
Jul 24, 2026
Source:
[email protected]
CVE-2026-16361 Details - Not Deferred