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Mozilla Firefox EUVDEUVD-2026-43663

| CVE-2026-15719 MEDIUM
2026-07-14 mozilla GHSA-hqh9-m4jx-3x67
Information Disclosure Red Hat Mozilla Suse
5.4
CVSS 3.1 · Vendor: mozilla
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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

Network-exploitable via browser content requiring user interaction; low confidentiality and integrity impact with no availability effect and no scope change, consistent with information disclosure tag.

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
MEDIUM
qualitative
Red Hat
8.8 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
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
Analysis Generated
Jul 14, 2026 - 15:06 vuln.today
CVSS changed
Jul 14, 2026 - 14:22 NVD
5.4 (MEDIUM)
CVE Published
Jul 14, 2026 - 12:15 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 14, 2026 - 12:15 cve.org
MEDIUM 5.4

DescriptionCVE.org

We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6.

AnalysisAI

Firefox versions prior to 152.0.6 are exposed to a network-exploitable flaw requiring user interaction that yields limited confidentiality and integrity impact within the browser context. Publicly available exploit code exists, confirmed by Mozilla's own advisory language, though the vendor reports no known attacks in the wild at time of disclosure. The fix is confirmed in Firefox 152.0.6, referenced in Mozilla security advisory MFSA2026-67.

Technical ContextAI

The affected product is Mozilla Firefox, identified by CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* covering all versions prior to the confirmed fix. No CWE classification was assigned, which limits formal root-cause analysis. The 'Information Disclosure' tag combined with the CVSS impact metrics of C:L and I:L suggests the flaw likely involves improper data exposure or a cross-origin boundary weakness within the browser engine or content rendering pipeline. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U) indicates the vulnerability is network-exploitable with low attack complexity and no required privileges, but mandates user interaction - consistent with a browser-context exploit triggered by visiting or interacting with malicious web content. The absence of scope change (S:U) suggests the impact is confined to the Firefox process itself rather than the underlying OS.

RemediationAI

The primary remediation is upgrading Mozilla Firefox to version 152.0.6 or later, the vendor-confirmed fixed release per Mozilla advisory MFSA2026-67 (https://www.mozilla.org/security/advisories/mfsa2026-67/). Enterprise environments using managed browser deployments should prioritize this update given the existence of public exploit code. Where immediate patching is not feasible, restricting users from visiting untrusted or unknown web content reduces exposure, though this is operationally impractical as a standalone control. Browser isolation technologies (e.g., remote browser isolation platforms) can neutralize browser-context exploits as a compensating control but introduce latency trade-offs. No specific feature-disable workaround is derivable from available data given the absence of a CWE or detailed technical description.

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Vendor StatusVendor

SUSE

Severity: Moderate
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

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EUVD-2026-43663 vulnerability details – vuln.today
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