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Red Hat CVE-2026-4715

| EUVDEUVD-2026-14845 CRITICAL
Use of Uninitialized Resource (CWE-908)
2026-03-24 mozilla GHSA-8cfw-c9hx-8f9v
Information Disclosure Red Hat Mozilla Suse
Critical
Disputed · 9.1 NVD
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Severity by source

Sources disagree (Medium–Critical)
NVD PRIMARY
9.1 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
SUSE
CRITICAL
qualitative
Red Hat
6.5 MEDIUM
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
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-2026-14845
Analysis Generated
Mar 24, 2026 - 12:45 vuln.today
CVE Published
Mar 24, 2026 - 12:30 nvd
CRITICAL 9.1

DescriptionCVE.org

Uninitialized memory in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9.

AnalysisAI

An uninitialized memory vulnerability exists in Firefox and Firefox ESR's Graphics Canvas2D component that can lead to information disclosure. Firefox versions prior to 149 and Firefox ESR versions prior to 140.9 are affected. …

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  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Visit malicious webpage with crafted Canvas2D
Exploit
Trigger uninitialized memory read
Execution
Leak sensitive browser data
Impact
Cause denial of service
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Vulnerability AssessmentAI

Exploitation Remote unauthenticated attacker can exploit Firefox versions before 149 (or ESR before 140.9) by delivering malicious content leveraging the Canvas2D component. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment While CVSS and CVSS vector data are not available for this CVE, the vulnerability is categorized as Information Disclosure, which typically carries moderate to high severity in the CVSS framework (though exact scoring cannot be confirmed). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A user visits a malicious website containing a specially crafted HTML5 Canvas2D script. The script performs a series of drawing operations on uninitialized Canvas buffers, causing the graphics subsystem to process uninitialized memory. …
Remediation Immediately upgrade Mozilla Firefox to version 149 or later, and Firefox ESR to version 140.9 or later. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours: Identify all affected systems and apply vendor patches immediately. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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Same weakness CWE-908 – Use of Uninitialized Resource

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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) -

SUSE

Severity: Critical
Product Status
Image SLES15-SP5-SAP-Azure-LI-BYOS Image SLES15-SP5-SAP-Azure-LI-BYOS-Production Image SLES15-SP5-SAP-Azure-VLI-BYOS Image SLES15-SP5-SAP-Azure-VLI-BYOS-Production Image SLES15-SP6-SAP-Azure-LI-BYOS Image SLES15-SP6-SAP-Azure-LI-BYOS-Production Image SLES15-SP6-SAP-Azure-VLI-BYOS Image SLES15-SP6-SAP-Azure-VLI-BYOS-Production Image SLES15-SP7-SAP-Azure-LI-BYOS-Production Image SLES15-SP7-SAP-Azure-VLI-BYOS-Production Affected
SUSE Liberty Linux 10 Fixed
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed

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CVE-2026-4715 vulnerability details – vuln.today
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