Skip to main content

Mozilla Firefox EUVDEUVD-2026-37097

| CVE-2026-12306 MEDIUM
Buffer Overflow (CWE-119)
2026-06-16 mozilla GHSA-p2g2-3x6h-6239
Buffer Overflow Mozilla
Medium
Disputed · 5.3 Vendor: mozilla
Share

Severity by source

Sources disagree (Medium–Critical)
Vendor (mozilla) PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
4.3 MEDIUM

Browser memory bugs require loading attacker content, warranting UI:R; confidentiality-only impact with no write primitive justifies C:L/I:N/A:N.

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:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
SUSE
CRITICAL
qualitative
Red Hat
6.1 MEDIUM
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: mozilla

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

3
Analysis Generated
Jul 23, 2026 - 16:44 vuln.today
CVE Published
Jun 16, 2026 - 11:52 cve.org
MEDIUM 5.3
CVE Published
Jun 16, 2026 - 11:52 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.

AnalysisAI

Memory safety bug (CWE-119, buffer bounds violation) in Mozilla Firefox prior to version 152 exposes limited memory contents to remote attackers without requiring authentication or user interaction per the supplied CVSS vector. Affected across all Firefox versions before 152 and ESR versions before 140.12, with multiple Mozilla security advisories (mfsa2026-57, mfsa2026-58, mfsa2026-60, mfsa2026-61) issued simultaneously, suggesting a coordinated release addressing this class of flaw. No active exploitation is confirmed (not in CISA KEV), and EPSS is very low at 0.28% (19th percentile), though SSVC flags the attack as automatable with partial technical impact.

Technical ContextAI

CWE-119 describes improper restriction of operations within the bounds of a memory buffer - encompassing out-of-bounds reads, writes, or both. The 'Buffer Overflow' tag and confidentiality-only CVSS impact (C:L/I:N/A:N) together suggest this is most likely an out-of-bounds read that leaks a limited amount of memory, rather than a write primitive that would enable code execution. The affected product is Mozilla Firefox across all releases (CPE: cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*), a browser engine that parses and renders complex, attacker-controlled web content from untrusted sources. Tags referencing Red Hat and SUSE indicate downstream Linux distribution packaging is also affected and likely requires separate package updates from those vendors. The Bugzilla report at bug 2037323 is the upstream tracking reference.

RemediationAI

Upgrade Mozilla Firefox to version 152 or later, or Firefox ESR to version 140.12 or later - both confirmed as fixed versions per Mozilla's coordinated advisories (https://www.mozilla.org/security/advisories/mfsa2026-57/, https://www.mozilla.org/security/advisories/mfsa2026-58/). Red Hat and SUSE users should apply updated browser packages from their respective vendor channels in addition to or instead of direct upstream upgrades. If immediate patching is not possible, the most effective compensating control is restricting access to untrusted websites via proxy content filtering, though this impairs normal browser use. Enterprise environments using Firefox ESR should prioritize the ESR track update to 140.12 as it is the long-term support channel. No workaround fully mitigates a memory safety bug short of patching.

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-2020-0796 CRITICAL POC
10.0
CVE-2017-11882 HIGH POC
7.8
CVE-2014-6332 HIGH POC
8.8
CVE-2015-2426 HIGH POC
8.8
CVE-2013-3918 HIGH POC
8.8
CVE-2023-4966 HIGH POC
7.5
CVE-2017-11774 HIGH POC
7.8
CVE-2013-3660 HIGH POC
7.8

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-2020-0796 CRITICAL POC
10.0
CVE-2019-11043 CRITICAL POC
9.8
CVE-2009-0927 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8

Vendor StatusVendor

SUSE

Severity: Critical
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected

Share

EUVD-2026-37097 vulnerability details – vuln.today
Back

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