Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact total

Affected Vendors & Products

Vendors Products
Mozilla
  • Firefox
  • Thunderbird

Configuration 1 [-]

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*

No data.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2016923 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-6760 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-6760 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-30/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-30/#CVE-2026-6760 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-33/ cve-icon cve-icon
History

Wed, 22 Apr 2026 17:45:00 +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, 22 Apr 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-288
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

 ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Wed, 22 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-807
References
Metrics threat_severity

None

 cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

threat_severity

Moderate

Wed, 22 Apr 2026 10:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-352

Wed, 22 Apr 2026 08:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Wed, 22 Apr 2026 03:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Wed, 22 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
Description Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150. Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
References

Tue, 21 Apr 2026 17:00:00 +0000

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

Tue, 21 Apr 2026 13:15:00 +0000

Type Values Removed Values Added
Description Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150.
Title Mitigation bypass in the Networking: Cookies component
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-04-21T12:40:55.131Z

Updated: 2026-04-22T15:34:58.133Z

Reserved: 2026-04-21T12:40:54.751Z

Link: CVE-2026-6760

cve-icon Vulnrichment

Updated: 2026-04-22T14:32:04.359Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-21T13:16:21.950

Modified: 2026-04-22T17:38:48.167

Link: CVE-2026-6760

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-21T12:40:55Z

Links: CVE-2026-6760 - Bugzilla