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Firefox EUVDEUVD-2026-26061

| CVE-2026-7324 HIGH
Buffer Overflow (CWE-119)
2026-04-28 mozilla
Buffer Overflow Mozilla RCE
7.3
CVSS 3.1 · Vendor: mozilla
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Severity by source

Vendor (mozilla) PRIMARY
7.3 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from Vendor (mozilla).

CVSS VectorVendor: mozilla

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

Lifecycle Timeline

6
Re-analysis Queued
Apr 28, 2026 - 20:23 vuln.today
cvss_changed
Analysis Generated
Apr 28, 2026 - 17:00 vuln.today
CVSS changed
Apr 28, 2026 - 16:22 NVD
7.3 (HIGH)
EUVD ID Assigned
Apr 28, 2026 - 14:30 euvd
EUVD-2026-26061
Analysis Generated
Apr 28, 2026 - 14:30 vuln.today
CVE Published
Apr 28, 2026 - 13:49 nvd
HIGH 7.3

DescriptionCVE.org

Memory safety bugs present in Firefox 150.0.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1.

AnalysisAI

Multiple memory corruption vulnerabilities in Firefox 150.0.0 and Thunderbird 150.0.0 enable remote code execution through memory safety bugs. Mozilla's security advisory confirms these flaws could allow arbitrary code execution with sufficient exploit development. No active exploitation confirmed at time of analysis, but SSVC framework rates this as automatable with partial technical impact. Vendor-released patch available in Firefox 150.0.1.

Technical ContextAI

This CVE encompasses multiple memory safety bugs classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), which includes buffer overflows, out-of-bounds reads/writes, and use-after-free conditions. The CPE identifier (cpe:2.3:a:mozilla:firefox) confirms Firefox as the primary affected product, with Thunderbird also impacted as it shares Firefox's Gecko rendering engine codebase. Memory corruption vulnerabilities in browser engines are particularly critical because they occur in the attack surface exposed to untrusted web content-HTML parsers, JavaScript engines, CSS processors, and media decoders. The Bugzilla references list four distinct bug IDs (2029419, 2029717, 2029769, 2029886), suggesting this is a composite CVE covering multiple related memory safety issues discovered during Mozilla's internal security audits. These types of vulnerabilities typically arise from unsafe memory operations in C/C++ code within the browser core.

RemediationAI

Vendor-released patch: Firefox 150.0.1 (confirmed fix version from CVE description). Users should immediately upgrade Firefox to version 150.0.1 or later through the browser's built-in update mechanism (Help > About Firefox) or download from https://www.mozilla.org/firefox/. Thunderbird users should monitor https://www.thunderbird.net/security/ for the corresponding patched release, likely Thunderbird 150.0.1 following Mozilla's parallel release pattern. Enterprise deployments using Extended Support Release (ESR) channels should verify applicable ESR patch versions in MFSA2026-35. No effective workarounds exist for memory corruption vulnerabilities in browser engines-disabling JavaScript or specific features would break core functionality while not fully mitigating risk since some bugs may exist in HTML/CSS parsers. Organizations unable to patch immediately should consider isolating Firefox usage to sandboxed environments or virtual desktops until updates can be deployed, though this introduces operational overhead and user experience degradation.

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Same weakness CWE-119 – Buffer Overflow

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Vendor StatusVendor

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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EUVD-2026-26061 vulnerability details – vuln.today
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