Mozilla Firefox CVE-2026-6777

| EUVD-2026-24118 MEDIUM
Cross-Site Request Forgery (CSRF) (CWE-352)
2026-04-21 mozilla GHSA-q3c8-p5vp-wr87
CSRF Mozilla
5.3
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Apr 21, 2026 - 18:25 vuln.today
CVSS changed
Apr 21, 2026 - 18:22 NVD
5.3 (None) 5.3 (MEDIUM)

DescriptionNVD

Other issue in the Networking: DNS component. This vulnerability was fixed in Firefox 150.

AnalysisAI

Denial of service in Firefox DNS networking component allows unauthenticated remote attackers to cause partial availability impact through crafted network requests. The vulnerability, classified as a cross-site request forgery (CSRF) issue within DNS handling, affects Firefox versions prior to 150 and has been patched by Mozilla.

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CVE-2026-6777 vulnerability details – vuln.today
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