Skip to main content

Mozilla Firefox CVE-2026-74968

| EUVDEUVD-2026-60687 MEDIUM
Origin Validation Error (CWE-346)
2026-08-18 mozilla GHSA-95wr-53r3-2jx3
Information Disclosure Mozilla Red Hat Suse
5.4
CVSS 3.1 · Vendor: mozilla
Share

Severity by source

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

Attack delivered via crafted network-accessible webpage (AV:N/AC:L/PR:N/UI:R); site isolation bypass stays within browser scope (S:U) with partial cross-origin read and write impact but no availability loss (C:L/I:L/A:N).

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

Lifecycle Timeline

4
Analysis Generated
Aug 18, 2026 - 15:45 vuln.today
CVSS changed
Aug 18, 2026 - 15:22 NVD
5.4 (MEDIUM)
CVE Published
Aug 18, 2026 - 12:23 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 18, 2026 - 12:23 cve.org
MEDIUM 5.4

DescriptionCVE.org

Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.

AnalysisAI

Site isolation bypass in Firefox's Graphics: WebRender component allows a remote attacker to achieve limited cross-origin information disclosure and content manipulation by delivering a crafted webpage to a user (CWE-346, origin validation error). All Firefox releases prior to 154 and Firefox ESR releases prior to 153.1 are affected across all platforms. …

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 malicious webpage
Delivery
User is lured and visits the page
Exploit
WebRender fails to validate cross-origin boundaries
Execution
Attacker page accesses or influences cross-origin rendered content
Impact
Limited cross-origin data disclosed to attacker
Sign in to reveal

Vulnerability AssessmentAI

Exploitation The victim must actively visit or be directed to a malicious or attacker-controlled webpage - passive exploitation without user interaction is not possible given the UI:R CVSS metric. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 5.4 Medium score is internally consistent with the vulnerability's profile: network-delivered (AV:N), low complexity with no prerequisites beyond user interaction (AC:L/PR:N/UI:R), unchanged scope (S:U), and limited confidentiality and integrity impact without any availability impact (C:L/I:L/A:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker registers or compromises a webpage and embeds content designed to exploit the WebRender origin validation flaw, then delivers the URL to a target via phishing or malicious advertisement. When the victim visits the page in an unpatched Firefox browser, the crafted rendering instructions cause WebRender to improperly validate origin boundaries, allowing the attacker's page to read or subtly influence pixel data or layout state from a cross-origin resource - such as a banking portal loaded in another tab. …
Remediation Upgrade to Firefox 154 or later for standard release users, or Firefox ESR 153.1 or later for users on the extended support channel. … 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-346 – Origin Validation Error

View all
CVE-2015-4495 HIGH POC
8.8
CVE-2025-34291 CRITICAL POC
9.4
CVE-2020-16952 HIGH POC
8.6
CVE-2022-50925 CRITICAL POC
9.8
CVE-2024-25124 CRITICAL POC
9.8
CVE-2023-29711 CRITICAL POC
9.8
CVE-2023-33443 CRITICAL POC
9.8
CVE-2023-29728 CRITICAL POC
9.8

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-2026-74968 vulnerability details – vuln.today
Back

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