Skip to main content

Mozilla Firefox CVE-2026-74971

| EUVDEUVD-2026-60666 MEDIUM
Information Exposure (CWE-200)
2026-08-18 mozilla GHSA-67f4-mqxj-f332
Information Disclosure Mozilla Red Hat Suse
4.3
CVSS 3.1 · Vendor: mozilla
Share

Severity by source

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

Network-delivered via web page (AV:N), no special conditions (AC:L), no attacker privileges (PR:N), victim must visit page (UI:R), impact strictly limited to partial confidentiality with no integrity or availability consequence.

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

Lifecycle Timeline

3
Analysis Generated
Aug 18, 2026 - 20:30 vuln.today
CVE Published
Aug 18, 2026 - 12:23 cve.org
MEDIUM 4.3
CVE Published
Aug 18, 2026 - 12:23 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Information disclosure in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.

AnalysisAI

Information disclosure in Firefox's DOM UI Events and Focus Handling component exposes limited sensitive data to remote attackers when a victim visits a crafted web page. All Firefox releases prior to 154, ESR prior to 140.14, and ESR 153.x prior to 153.1 are affected across all platforms, as confirmed by Mozilla across six simultaneous security advisories (mfsa2026-74 through mfsa2026-80). …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attacker hosts crafted web page
Delivery
Victim visits or is redirected to page
Exploit
Malicious script triggers DOM focus event sequence
Execution
Firefox improperly exposes sensitive data
Persist
Attacker script reads disclosed information
Impact
Data exfiltrated to attacker-controlled endpoint
Sign in to reveal

Vulnerability AssessmentAI

Exploitation Exploitation requires a victim running an unpatched Firefox version (prior to 154, ESR 140.14, or ESR 153.1) to visit or be redirected to an attacker-controlled web page, satisfying the UI:R prerequisite in the CVSS vector. … 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:R/S:U/C:L/I:N/A:N yields a Medium score of 4.3. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a web page that manipulates DOM focus events in a specific sequence targeting the vulnerable UI Events handler in Firefox. When a victim navigates to or is social-engineered into visiting this page, the malicious script triggers the information disclosure, potentially reading limited sensitive data - such as cross-origin state indicators or user interaction metadata - that Firefox improperly exposes during focus transitions. …
Remediation Upgrade to Firefox 154 or later for standard release channel users, Firefox ESR 140.14 or later for the ESR 140.x track, or Firefox ESR 153.1 or later for the ESR 153.x track, as confirmed by Mozilla's security advisories at https://www.mozilla.org/security/advisories/mfsa2026-74/ and associated mfsa2026-76 through mfsa2026-80. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Threat intelligence, references, and detailed analysis are available after sign-in.

More in Mozilla

View all
CVE-2015-4495 HIGH POC
8.8 Aug 08

The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote
CVE-2013-1690 HIGH POC
8.8 Jun 26

Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before

CVE-2013-0758 CRITICAL POC
9.3 Jan 13

Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderb
CVE-2013-0753 CRITICAL POC
9.3 Jan 13

Use-after-free vulnerability in the serializeToStream implementation in the XMLSerializer component in Mozilla Firefox b
CVE-2012-3993 CRITICAL POC
9.3 Oct 10

The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbi
CVE-2013-1710 CRITICAL POC
10.0 Aug 07

The crypto.generateCRMFRequest function in Mozilla Firefox before 23.0, Firefox ESR 17.x before 17.0.8, Thunderbird befo
CVE-2017-3823 HIGH POC
8.8 Feb 01

An issue was discovered in the Cisco WebEx Extension before 1.0.7 on Google Chrome, the ActiveTouch General Plugin Conta
CVE-2014-8636 HIGH POC
7.5 Jan 14

The XrayWrapper implementation in Mozilla Firefox before 35.0 and SeaMonkey before 2.32 does not properly interact with

CVE-2013-0757 CRITICAL POC
9.3 Jan 13

The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbi
CVE-2014-1510 CRITICAL POC
9.8 Mar 19

The Web IDL implementation in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and Se
CVE-2014-1511 CRITICAL POC
9.8 Mar 19

Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25 allow remo
CVE-2013-0643 HIGH
8.8 Feb 27

The Firefox sandbox in Adobe Flash Player before 10.3.183.67 and 11.x before 11.6.602.171 on Windows and Mac OS X, and b

Same weakness CWE-200 – Information Exposure

View all
CVE-2024-24919 HIGH POC
8.6
CVE-2016-6415 HIGH POC
7.5
CVE-2013-7331 MEDIUM POC
6.5
CVE-2025-31125 MEDIUM POC
5.3
CVE-2025-11749 CRITICAL POC
9.8
CVE-2017-16894 HIGH POC
7.5
CVE-2017-11165 CRITICAL POC
9.8
CVE-2020-3259 HIGH
7.5

Same technique Information Disclosure

View all
CVE-2019-2725 CRITICAL POC
9.8
CVE-2021-34523 CRITICAL POC
9.0
CVE-2013-2251 CRITICAL POC
9.8
CVE-2017-5638 CRITICAL POC
9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5
CVE-2014-6324 HIGH POC
8.8

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

Share

CVE-2026-74971 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy