Skip to main content

Firefox EUVDEUVD-2026-26057

| CVE-2026-7320 HIGH
Buffer Overflow (CWE-119)
2026-04-28 mozilla
Buffer Overflow Information Disclosure Mozilla
7.5
CVSS 3.1 · Vendor: mozilla
Share

Severity by source

Vendor (mozilla) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from Vendor (mozilla).

CVSS VectorVendor: mozilla

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

Lifecycle Timeline

6
Re-analysis Queued
Apr 28, 2026 - 20:23 vuln.today
cvss_changed
Analysis Generated
Apr 28, 2026 - 17:00 vuln.today
CVSS changed
Apr 28, 2026 - 16:22 NVD
7.5 (HIGH)
EUVD ID Assigned
Apr 28, 2026 - 14:30 euvd
EUVD-2026-26057
Analysis Generated
Apr 28, 2026 - 14:30 vuln.today
CVE Published
Apr 28, 2026 - 13:49 nvd
HIGH 7.5

DescriptionCVE.org

Information disclosure due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, and Firefox ESR 115.35.1.

AnalysisAI

Information disclosure in Mozilla Firefox, Firefox ESR 140, and Firefox ESR 115 allows remote unauthenticated attackers to extract sensitive data via incorrect boundary conditions in the Audio/Video component. The vulnerability permits network-based exploitation with low complexity and no user interaction (CVSS:3.1/AV:N/AC:L/PR:N/UI:N), enabling unauthorized access to high-confidentiality information. Mozilla released patches in Firefox 150.0.1, Firefox ESR 140.10.1, and Firefox ESR 115.35.1 (confirmed by vendor advisories MFSA2026-35/36/37). SSVC indicates automatable exploitation with partial technical impact, though no public exploit or active exploitation is identified at time of analysis.

Technical ContextAI

The vulnerability resides in Firefox's Audio/Video processing component and stems from incorrect boundary conditions (CWE-119), a class of buffer handling flaws where code fails to properly verify that data operations stay within allocated memory bounds. The 'Buffer Overflow' tag combined with CWE-119 suggests the boundary error may involve buffer length calculations during media codec operations, audio/video stream parsing, or multimedia container format processing. Affected products per CPE include Mozilla Firefox (cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*) across three major release channels: mainline Firefox (<150.0.1), Extended Support Release 140 branch (<140.10.1), and ESR 115 long-term support branch (<115.35.1). The Audio/Video subsystem likely uses native code (C/C++) for performance-critical media decoding where boundary miscalculations can expose adjacent memory contents without causing a crash, enabling information leakage rather than code execution.

RemediationAI

Upgrade immediately to vendor-released patched versions: Firefox 150.0.1 for mainline users, Firefox ESR 140.10.1 for organizations on the 140 extended support channel, or Firefox ESR 115.35.1 for long-term support deployments. Download patches directly from https://www.mozilla.org/firefox/ or use enterprise update mechanisms. Verify installed version via Firefox menu → Help → About Firefox to confirm successful patching. For environments unable to patch immediately, implement compensating controls: configure Firefox Enterprise Policy to disable automatic media playback (DisableMediaPlayback=true in policies.json) which reduces but does not eliminate attack surface as users can still manually initiate media processing; restrict Firefox usage to trusted internal sites only via proxy whitelisting or network segmentation; or temporarily substitute alternative browsers for untrusted web browsing until patching is complete. Note that disabling media playback significantly degrades user experience for legitimate multimedia content and should be considered a short-term emergency mitigation only. Detailed technical guidance is available in Mozilla advisories MFSA2026-35/36/37.

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-119 – Buffer Overflow

View all
CVE-2017-11882 HIGH POC
7.8
CVE-2014-6332 HIGH POC
8.8
CVE-2023-4966 CRITICAL POC
9.4
CVE-2015-2426 HIGH POC
8.8
CVE-2013-3918 HIGH POC
8.8
CVE-2017-11774 HIGH POC
7.8
CVE-2013-3660 HIGH POC
7.8
CVE-2017-6736 HIGH POC
8.8

Same technique Buffer Overflow

View all
CVE-2017-7269 CRITICAL POC
9.8
CVE-2015-5119 CRITICAL POC
9.8
CVE-2015-3113 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2009-0927 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8
CVE-2017-11882 HIGH POC
7.8
CVE-2010-3333 HIGH POC
7.8

Vendor StatusVendor

SUSE

Severity: High
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected
SUSE Linux Enterprise Server 16.0 Affected
SUSE Linux Enterprise Workstation Extension 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected

Share

EUVD-2026-26057 vulnerability details – vuln.today
Back

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