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Mozilla Firefox CVE-2026-16376

| EUVDEUVD-2026-46212 HIGH
Uncontrolled Resource Consumption (CWE-400)
2026-07-21 mozilla GHSA-h99j-5x2q-c4x4
Denial Of Service Red Hat Mozilla
High
Disputed · 7.5 Vendor: mozilla
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Severity by source

Sources disagree (Medium–Critical)
Vendor (mozilla) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
7.5 HIGH

Any web page can trigger the WebGPU DoS with no auth or interaction (AV:N/AC:L/PR:N/UI:N); impact is an availability-only crash (A:H, C:N/I:N).

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
CRITICAL
qualitative
Red Hat
6.1 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 VectorVendor: mozilla

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

Lifecycle Timeline

4
Analysis Generated
Jul 22, 2026 - 19:37 vuln.today
CVSS changed
Jul 22, 2026 - 18:22 NVD
7.5 (HIGH)
CVE Published
Jul 21, 2026 - 12:37 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 21, 2026 - 12:37 cve.org
HIGH 7.5

DescriptionCVE.org

Denial-of-service in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 153.

AnalysisAI

Remote denial-of-service in Mozilla Firefox's Graphics: WebGPU component allows a malicious web page to exhaust browser resources and crash or hang the browser without any user credentials or interaction. The flaw affects Firefox versions prior to 153 and is triggered simply by loading attacker-controlled content that abuses the WebGPU API. There is no public exploit identified at time of analysis, and EPSS scores the exploitation likelihood at only 0.14%, indicating low near-term probability of widespread exploitation.

Technical ContextAI

The vulnerability lives in Firefox's WebGPU implementation, the browser-exposed API that grants JavaScript low-level access to the GPU for rendering and general-purpose compute. The root cause maps to CWE-400 (Uncontrolled Resource Consumption): the WebGPU code path fails to bound the resources a web page can request or allocate, so a crafted sequence of GPU commands, buffers, or pipeline objects can drive memory, GPU, or CPU consumption to the point of failure. Because WebGPU processes untrusted content directly from any visited site, the attack surface is reachable by ordinary web pages. The affected product per CPE is cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*, i.e. the Firefox application across versions preceding the fixed 153 release.

RemediationAI

Upgrade to Vendor-released patch: Firefox 153, which contains the fix for the WebGPU resource-consumption flaw, and allow Firefox's automatic update mechanism to apply it or push the update through managed deployment. Consult Mozilla's advisory MFSA2026-68 (https://www.mozilla.org/security/advisories/mfsa2026-68/) for authoritative version guidance. As an interim compensating control where patching is delayed, WebGPU can be disabled via about:config by setting dom.webgpu.enabled to false, which removes the vulnerable attack surface at the cost of breaking sites that legitimately rely on GPU acceleration through WebGPU; enterprises can enforce this through policy configuration. Because the impact is limited to availability (a crash or hang) with no code execution or data exposure, restarting the browser fully recovers the affected session.

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Same weakness CWE-400 – Uncontrolled Resource Consumption

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Same technique Denial Of Service

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Vendor StatusVendor

SUSE

Severity: Critical
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected

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CVE-2026-16376 vulnerability details – vuln.today
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