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Firefox for Android CVE-2026-84117

| EUVDEUVD-2026-69069 HIGH
Improper Access Control (CWE-284)
2026-09-01 mozilla GHSA-j4x5-f27p-w46x
Authentication Bypass Privilege Escalation Mozilla
8.8
CVSS 3.1 · Vendor: mozilla
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Severity by source

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

Network-delivered browser flaw requires user interaction but no attacker privileges; full C/I/A impact on the vulnerable system with no documented scope change into a separate component.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/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
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Metadata Corrected
Sep 01, 2026 - 15:40 vuln.today
tag: Google removed
Analysis Generated
Sep 01, 2026 - 15:13 vuln.today
CVSS changed
Sep 01, 2026 - 14:22 NVD
8.8 (None) 8.8 (HIGH)
CVE Published
Sep 01, 2026 - 12:18 cve.org
UNKNOWN (no severity yet)
CVE Published
Sep 01, 2026 - 12:18 cve.org
HIGH 8.8

DescriptionCVE.org

Privilege escalation in Firefox for Android. This vulnerability was fixed in Firefox 155.

Articles & Coverage 1

News 7 New Mozilla Vulnerabilities - 2 Critical, 5 High Severity Sep 02, 2026

AnalysisAI

Privilege escalation in Mozilla Firefox for Android (versions prior to 155) allows a remote, unauthenticated attacker to achieve full compromise of confidentiality, integrity, and availability by exploiting improper access control (CWE-284) when a user interacts with attacker-controlled content. Mozilla confirmed the fix in Firefox 155, documented under MFSA2026-82. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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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 User interaction is required (UI:R in the CVSS vector) - the victim must visit attacker-controlled content and perform at least one interaction within Firefox for Android. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 8.8 (High) is driven by network delivery (AV:N), low complexity (AC:L), no required privileges (PR:N), and total C/I/A impact - offset only by required user interaction (UI:R). … 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 Firefox for Android to version 155 or later, as confirmed by Mozilla in security advisory MFSA2026-82 (https://www.mozilla.org/security/advisories/mfsa2026-82/). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all Firefox for Android deployments across your organization and user base; communicate the vulnerability to device owners and administrators. …

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Same weakness CWE-284 – Improper Access Control

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected

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CVE-2026-84117 vulnerability details – vuln.today
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