Privilege escalation in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
History

Wed, 19 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Vendors & Products Mozilla thunderbird

Wed, 19 Aug 2026 00:15:00 +0000


Tue, 18 Aug 2026 19:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-732

Tue, 18 Aug 2026 19:00:00 +0000

Type Values Removed Values Added
Description Privilege escalation in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. Privilege escalation in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
References

Tue, 18 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 18 Aug 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox

Tue, 18 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-269
CWE-732

Tue, 18 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
Description Privilege escalation in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.
Title Privilege escalation in the Networking: Cookies component
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-08-18T18:55:08.608Z

Reserved: 2026-08-17T11:58:05.742Z

Link: CVE-2026-74953

cve-icon Vulnrichment

Updated: 2026-08-18T15:35:39.482Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-18T13:17:32.230

Modified: 2026-08-19T16:37:59.660

Link: CVE-2026-74953

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-18T12:23:30Z

Links: CVE-2026-74953 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-18T22:30:04Z