What is the CVSS score of CVE-2026-4701?

CVE-2026-4701 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-2026-4701?

Organizations using the JavaScript Engine component. This vulnerability affects Firefox face critical risk from CVE-2026-4701, a use-after-free vulnerability rated CVSS 9.8.. A patch is available.

Red Hat CVE-2026-4701

Q: How to fix or mitigate CVE-2026-4701?

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

EUVD-2026-14819 CRITICAL

Use After Free (CWE-416)

2026-03-24 mozilla

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-2026-14819

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 JavaScript Engine component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9.

AnalysisAI

Mozilla Firefox versions below 149 (and ESR versions below 140.9) contain a use-after-free vulnerability in the JavaScript Engine that enables unauthenticated remote attackers to achieve arbitrary code execution without user interaction. The memory corruption flaw allows complete compromise of affected systems through network-based attacks. …

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

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

More from same product – last 7 days

CVE-2026-44739 HIGH This Week

8.7 May 27

SQL injection in Pimcore's CustomReportsBundle (versions ≤ 12.3.5) lets an authenticated user holding the reports_config

CVE-2026-9277 HIGH This Week

8.1 May 22

Command injection in the shell-quote npm package allows attackers who can influence object-token inputs to inject arbitr

CVE-2026-9256 HIGH This Week

8.1 May 22

Heap buffer overflow in NGINX Plus and NGINX Open Source ngx_http_rewrite_module allows unauthenticated remote attackers

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-2026-4701 vulnerability details – vuln.today

Back

Red Hat CVE-2026-4701

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

Full analysis requires sign-in

More from same product – last 7 days

Vendor StatusVendor

Debian

Share

External POC / Exploit Code