Is Firefox affected by CVE-2026-4712?

CVE-2026-4712 presents notable security risk, a information exposure vulnerability rated CVSS 7.5. This could expose sensitive information including credentials, configuration data, or user records to unauthorized parties.

CVE-2026-4712

Q: How to fix CVE-2026-4712?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

EUVD-2026-14839 HIGH

2026-03-24 mozilla

GHSA-vcpc-fv28-ppg5

7.5

CVSS 3.1

CVSS Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Patch Released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 24, 2026 - 12:45 vuln.today

EUVD ID Assigned

Mar 24, 2026 - 12:45 euvd

EUVD-2026-14839

CVE Published

Mar 24, 2026 - 12:30 nvd

HIGH 7.5

Description

Information disclosure in the Widget: Cocoa component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9.

Analysis

An information disclosure vulnerability exists in the Widget: Cocoa component of Mozilla Firefox and Firefox ESR, allowing attackers to access sensitive information through the affected rendering engine. Firefox versions prior to 149 and Firefox ESR versions prior to 140.9 are vulnerable. …

Remediation

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

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.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.0

CVSS: +38

POC: 0

Vendor Status

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-2026-4712 vulnerability details – vuln.today

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CVE-2026-4712

CVSS Vector

Lifecycle Timeline

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Description

Analysis

Remediation

Analysis

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Priority Score

Vendor Status

Debian

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CVE-2026-4712

CVSS Vector

Lifecycle Timeline

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Description

Analysis

Remediation

Full analysis requires sign-in

Priority Score

Vendor Status

Debian

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External POC / Exploit Code