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Firefox CVE-2026-8093

| EUVDEUVD-2026-28364 HIGH
Buffer Overflow (CWE-119)
2026-05-07 mozilla GHSA-q57p-jr92-jcv9
Mozilla RCE Buffer Overflow
8.1
CVSS 3.1 · Vendor: mozilla
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Severity by source

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

Primary rating from Vendor (mozilla).

CVSS VectorVendor: mozilla

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

Lifecycle Timeline

6
Re-analysis Queued
May 08, 2026 - 15:22 vuln.today
cvss_changed
CVSS changed
May 08, 2026 - 15:22 NVD
7.5 (HIGH) 8.1 (HIGH)
Analysis Generated
May 07, 2026 - 15:45 vuln.today
CVSS changed
May 07, 2026 - 15:22 NVD
7.5 (None) 7.5 (HIGH)
CVE Published
May 07, 2026 - 12:45 nvd
UNKNOWN (no severity yet)
CVE Published
May 07, 2026 - 12:45 nvd
HIGH 7.5

DescriptionCVE.org

Memory safety bugs present in Firefox 150.0.1. 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 150.0.2.

AnalysisAI

Multiple memory corruption vulnerabilities in Firefox 150.0.1 enable potential remote code execution through memory safety flaws in the browser engine. Mozilla's advisory references 10 distinct bugs demonstrating memory corruption, which with sufficient exploitation effort could allow arbitrary code execution. Firefox 150.0.2 addresses these vulnerabilities. CVSS rates this 7.5 High (network-exploitable, no authentication required), though the vector indicates only availability impact, contradicting the RCE assessment in Mozilla's advisory. SSVC framework confirms no active exploitation and partial technical impact.

Technical ContextAI

This vulnerability encompasses multiple memory safety bugs (CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer) affecting Mozilla Firefox's browser engine. The CPE string identifies Firefox versions up to but not including 150.0.2 as vulnerable. Memory safety bugs in browser engines typically involve use-after-free, buffer overflows, or out-of-bounds read/write conditions in components handling JavaScript execution, DOM manipulation, CSS rendering, or network protocol parsing. The Bugzilla reference lists 10 specific bug IDs (1981270, 2027154, 2028332, 2029327, 2029428, 2029894, 2032189, 2034837, 2035968, 2036256), indicating multiple distinct memory corruption issues rather than a single flaw. Mozilla's phrasing 'we presume that with enough effort' suggests these are potential RCE vectors rather than confirmed exploitable code execution paths.

RemediationAI

Immediately upgrade all Firefox installations to version 150.0.2 or later, which contains fixes for all 10 identified memory safety bugs per Mozilla Security Advisory MFSA2026-40 (https://www.mozilla.org/security/advisories/mfsa2026-40/). Enterprise deployments should prioritize systems with direct internet access or untrusted web content exposure. For environments unable to patch immediately, implement defense-in-depth controls: restrict Firefox usage to trusted internal sites only via proxy whitelist (reduces attack surface but severely limits functionality), deploy endpoint detection and response (EDR) tools with memory corruption detection signatures (may catch exploitation attempts but not prevent initial trigger), or temporarily substitute an alternative browser for untrusted content (operational disruption, requires user retraining). Enable automatic updates where feasible to prevent regression to vulnerable versions. No workarounds can fully mitigate memory corruption vulnerabilities without patching; all compensating controls have significant limitations and should be considered temporary only.

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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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CVE-2026-8093 vulnerability details – vuln.today
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