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Mozilla Firefox EUVDEUVD-2026-60757

| CVE-2026-74957 HIGH
Protection Mechanism Failure (CWE-693)
2026-08-18 mozilla GHSA-w4xm-w4c4-5fhg
Authentication Bypass Mozilla
8.1
CVSS 3.1 · Vendor: mozilla
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Severity by source

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

Network-delivered bypass requiring user navigation; no privileges needed; High C and I reflect phishing credential theft and malware delivery; no availability impact applies.

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

Primary rating from Vendor (mozilla).

CVSS VectorVendor: mozilla

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

Lifecycle Timeline

4
Analysis Generated
Aug 21, 2026 - 22:32 vuln.today
CVSS changed
Aug 21, 2026 - 20:22 NVD
8.1 (HIGH)
CVE Published
Aug 18, 2026 - 12:23 cve.org
HIGH 8.1
CVE Published
Aug 18, 2026 - 12:23 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Mitigation bypass in the Safe Browsing component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.

AnalysisAI

Safe Browsing mitigation bypass in Mozilla Firefox allows a remote unauthenticated attacker (with user interaction) to circumvent Firefox's phishing and malware URL-blocking protections, classified under CWE-693 (Protection Mechanism Failure). Affected versions span all Firefox releases prior to 154 and all ESR branches prior to 140.14 and 153.1, giving this a broad blast radius across consumer and enterprise deployments. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attacker registers phishing or malware-hosting URL
Delivery
Crafts navigation sequence exploiting Safe Browsing bypass
Exploit
Victim clicks or follows attacker-supplied link
Execution
Firefox skips Safe Browsing interstitial
Persist
Victim lands on unblocked malicious page
Impact
Credentials phished or malware delivered
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Vulnerability AssessmentAI

Exploitation User interaction is required - the CVSS UI:R metric confirms the victim must actively navigate to or click a link leading to the malicious URL. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 8.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N) reflects meaningful theoretical impact: network-reachable, low complexity, no privileges required, but requiring user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker registers or compromises a domain that Firefox's Safe Browsing service has flagged as a phishing or malware host. By exploiting the bypass, the attacker crafts a URL or navigation sequence that causes Firefox to skip the Safe Browsing interstitial, delivering the user directly to the malicious page. …
Remediation Vendor-released patch: Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, audit Firefox deployment footprint across the organization and issue a security alert to users detailing the vulnerability and interim protections. …

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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-2026-60757 vulnerability details – vuln.today
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