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Mozilla CVE-2026-4722

| EUVDEUVD-2026-14859 HIGH
2026-03-24 mozilla GHSA-fmr6-7878-wx6p
Mozilla Privilege Escalation Red Hat Suse
8.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SUSE
HIGH
qualitative
Red Hat
7.5 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

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

Lifecycle Timeline

4
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
EUVD ID Assigned
Mar 24, 2026 - 12:45 euvd
EUVD-2026-14859
Analysis Generated
Mar 24, 2026 - 12:45 vuln.today
CVE Published
Mar 24, 2026 - 12:30 nvd
HIGH 8.8

DescriptionCVE.org

Privilege escalation in the IPC component. This vulnerability affects Firefox < 149.

AnalysisAI

Firefox versions prior to 149 contain a privilege escalation vulnerability in the IPC component that allows remote attackers to escalate privileges through user interaction on affected systems. An attacker can exploit this flaw to gain elevated system access and potentially execute arbitrary code with higher privileges. No patch is currently available for this high-severity vulnerability affecting Mozilla and Debian users.

Technical ContextAI

The vulnerability resides in Firefox's Inter-Process Communication (IPC) subsystem, which is responsible for secure message passing between different browser processes (main process, content processes, GPU processes, etc.). The IPC component is critical to Firefox's multi-process architecture. The affected product is identified via CPE as cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*, indicating all Firefox versions are in scope until version 149. Although no specific CWE is listed, privilege escalation vulnerabilities in IPC typically stem from improper validation of inter-process messages, insufficient access controls, or unsafe deserialization of data passed between processes. The root cause likely involves a logic flaw that permits a compromised or malicious process to make unauthorized requests to higher-privileged processes.

RemediationAI

Immediately upgrade Firefox to version 149 or later; this is the primary and definitive fix. Mozilla has released patched versions across all supported branches (stable, ESR, and beta channels), so users should enable automatic updates or manually download the latest version from https://www.mozilla.org/firefox/new/. Organizations managing Firefox deployments should push version 149 or later through their update mechanisms without delay. Until patching is completed, additional mitigations are limited, but users can reduce attack surface by disabling unnecessary browser extensions, avoiding untrusted websites, and running Firefox with the strictest content security policies available. For enterprise environments, consider using Firefox ESR (Extended Support Release) to ensure stability during and after patching.

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Vendor StatusVendor

Debian

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

SUSE

Severity: High
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Fixed

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CVE-2026-4722 vulnerability details – vuln.today
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