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Mozilla Firefox CVE-2026-84130

| EUVDEUVD-2026-69079 HIGH
Information Exposure (CWE-200)
2026-09-01 mozilla GHSA-jwmp-8c9r-99c2
Information Disclosure Mozilla Suse
7.5
CVSS 3.1 · Vendor: mozilla
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Severity by source

Vendor (mozilla) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI
6.5 MEDIUM

UI:R replaces vendor UI:N because exploitation requires the user to visit a malicious page; all other metrics align with the vendor vector.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative

Primary rating from Vendor (mozilla).

CVSS VectorVendor: mozilla

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Analysis Generated
Sep 03, 2026 - 20:40 vuln.today
CVSS changed
Sep 03, 2026 - 18:37 NVD
7.5 (HIGH)
CVE Published
Sep 01, 2026 - 12:18 cve.org
HIGH 7.5
CVE Published
Sep 01, 2026 - 12:18 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Information disclosure in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.

AnalysisAI

Information disclosure in Mozilla Firefox's WebGPU graphics component allows remote attackers to read sensitive data - potentially including cross-origin content or GPU memory - by luring a user to a crafted web page. Affected releases are all Firefox versions prior to 155 and Firefox ESR prior to 153.2. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Exploit
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Vulnerability AssessmentAI

Exploitation Exploitation requires a Firefox user running a version prior to 155 (stable) or 153.2 (ESR) to visit an attacker-controlled web page that exercises the WebGPU API. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, score 7.5) assigns UI:N, which does not reflect browser-exploitation norms: triggering a WebGPU bug requires a user to navigate to a malicious web page, firmly placing this in UI:R territory and reducing the realistic base score to approximately 6.5. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to Mozilla Firefox 155 or later (stable channel) or Firefox ESR 153.2 or later; both versions are confirmed by the vendor to resolve this vulnerability across MFSA2026-82, MFSA2026-85, MFSA2026-86, and MFSA2026-88. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all Firefox installations across the organization including standard and ESR variants to establish baseline exposure. …

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Same technique Information Disclosure

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected

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CVE-2026-84130 vulnerability details – vuln.today
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