What is the CVSS score of CVE-2026-4711?

CVE-2026-4711 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Red Hat are affected by CVE-2026-4711?

CVE-2026-4711 presents critical security risk, a use-after-free vulnerability rated CVSS 9.8.. A patch is available.

Red Hat CVE-2026-4711

Q: How to fix or mitigate CVE-2026-4711?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

EUVD-2026-14837 CRITICAL

Use After Free (CWE-416)

2026-03-24 mozilla

GHSA-9979-85jw-xp9m

Information Disclosure Use After Free Memory Corruption Red Hat Mozilla Suse

9.8

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

EUVD ID Assigned

Mar 24, 2026 - 12:45 euvd

EUVD-2026-14837

Analysis Generated

Mar 24, 2026 - 12:45 vuln.today

CVE Published

Mar 24, 2026 - 12:30 nvd

CRITICAL 9.8

DescriptionNVD

Use-after-free in the Widget: Cocoa component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9.

AnalysisAI

A use-after-free vulnerability in Firefox's Cocoa widget component allows remote code execution without user interaction or special privileges, affecting Firefox versions below 149 and ESR below 140.9. An attacker can exploit this memory corruption flaw over the network to achieve complete system compromise with high confidentiality, integrity, and availability impact. …

RemediationAI

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

Full analysis requires sign-in

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Vendor StatusVendor

Debian

firefox

Release	Status	Fixed Version	Urgency
sid	vulnerable	148.0.2-1	-
(unstable)	fixed	(unfixed)	-

firefox-esr

Release	Status	Fixed Version	Urgency
bullseye	vulnerable	115.14.0esr-1~deb11u1	-
bullseye (security)	vulnerable	140.8.0esr-1~deb11u1	-
bookworm	vulnerable	128.14.0esr-1~deb12u1	-
bookworm (security)	vulnerable	140.8.0esr-1~deb12u1	-
trixie (security), trixie	vulnerable	140.8.0esr-1~deb13u1	-
forky, sid	vulnerable	140.8.0esr-1	-
(unstable)	fixed	(unfixed)	-

CVE-2026-4711 vulnerability details – vuln.today

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Red Hat CVE-2026-4711

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

Full analysis requires sign-in

More from same product – last 7 days

Vendor StatusVendor

Debian

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External POC / Exploit Code