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Mozilla Firefox EUVDEUVD-2026-60695

| CVE-2026-74982 HIGH
Uncontrolled Resource Consumption (CWE-400)
2026-08-18 mozilla GHSA-wfpq-7pgh-wwvj
Denial Of Service Mozilla
High
Disputed · 7.5 Vendor: mozilla
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Severity by source

Sources disagree (Low–High)
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
6.5 MEDIUM

Browser DoS requires user navigation to malicious content, making UI:R more accurate than UI:N; all other metrics align with network-delivered availability-only impact.

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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
Aug 20, 2026 - 18:30 vuln.today
CVSS changed
Aug 20, 2026 - 18:22 NVD
7.5 (HIGH)
CVE Published
Aug 18, 2026 - 12:23 cve.org
HIGH 7.5
CVE Published
Aug 18, 2026 - 12:23 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Denial-of-service in the Widget component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.

AnalysisAI

Denial-of-service in Mozilla Firefox's Widget component allows remote attackers to crash or hang the browser via specially crafted web content, exploiting uncontrolled resource consumption (CWE-400). All Firefox versions prior to 154 and Firefox ESR versions prior to 153.1 are affected, with Mozilla issuing patches across four security advisories (mfsa2026-74, -77, -78, -80). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Based on the CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U), no authentication or special configuration is required. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yields a 7.5 score reflecting high availability impact with no authentication barrier, but the EPSS score of 0.15% at the 5th percentile sharply contradicts the urgency implied by the raw CVSS figure - exploitation remains statistically uncommon. … 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 The primary remediation is upgrading to Mozilla Firefox 154 or Firefox ESR 153.1, both confirmed as fixed releases per Mozilla's official advisories at https://www.mozilla.org/security/advisories/mfsa2026-74/ and related mfsa2026-77, mfsa2026-78, mfsa2026-80. … Detailed patch versions, workarounds, and compensating controls in full report.
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Within 24 hours, inventory all Firefox installations across the organization and determine the number of affected users and versions currently deployed. …

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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: Important
Product Status
Container suse/kiosk/firefox-esr:140.14-75.12 Affected
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Desktop Applications 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Fixed

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EUVD-2026-60695 vulnerability details – vuln.today
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