Mozilla Firefox CVE-2026-6746

| EUVD-2026-24087 HIGH
Use After Free (CWE-416)
2026-04-21 mozilla GHSA-r37m-3hw5-974w
Information Disclosure Use After Free Memory Corruption Mozilla
7.5
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:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Analysis Updated
Apr 22, 2026 - 00:45 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Apr 22, 2026 - 00:22 vuln.today
cvss_changed
Analysis Generated
Apr 21, 2026 - 18:23 vuln.today
CVSS changed
Apr 21, 2026 - 18:22 NVD
7.5 (HIGH)

DescriptionNVD

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.

AnalysisAI

High-severity denial-of-service condition in Mozilla Firefox DOM processing allows remote attackers to crash the browser via network-delivered content without authentication or user interaction. Fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10. …

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RemediationAI

Within 24 hours: Distribute notification to all Firefox users advising immediate upgrade to Firefox 150 or applicable ESR version (115.35 or 140.10). Within 7 days: Verify upgrade completion via endpoint management tools and audit browser version compliance across the organization. …

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CVE-2026-6746 vulnerability details – vuln.today
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