CVE-2026-16361

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-16361
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.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518 Broken Link
https://www.mozilla.org/security/advisories/mfsa2026-69/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-70/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-72/ Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
History

24 Jul 2026, 15:52

Type Values Removed Values Added
First Time Mozilla
Mozilla thunderbird
Mozilla firefox
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
References () https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518 - () https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518 - Broken Link
References () https://www.mozilla.org/security/advisories/mfsa2026-69/ - () https://www.mozilla.org/security/advisories/mfsa2026-69/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-70/ - () https://www.mozilla.org/security/advisories/mfsa2026-70/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-72/ - () https://www.mozilla.org/security/advisories/mfsa2026-72/ - Vendor Advisory

22 Jul 2026, 20:16

Type Values Removed Values Added
References
  • () https://www.mozilla.org/security/advisories/mfsa2026-72/ -
Summary (en) Memory safety bugs present in Firefox ESR 115.37 and Firefox 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 and Firefox ESR 140.13. (en) 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.

21 Jul 2026, 19:17

Type Values Removed Values Added
CWE CWE-119
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8

21 Jul 2026, 13:17

Type Values Removed Values Added
New CVE
Information

Published : 2026-07-21 13:17

Updated : 2026-07-24 15:52

NVD link : CVE-2026-16361

Mitre link : CVE-2026-16361

CVE.ORG link : CVE-2026-16361

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer