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Firefox for Android EUVDEUVD-2026-46209

| CVE-2026-16373 HIGH
Information Exposure (CWE-200)
2026-07-21 mozilla GHSA-6x3h-xph6-q87j
Information Disclosure Google Red Hat Mozilla
High
Disputed · 7.5 Vendor: mozilla
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Severity by source

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

Network-delivered via web content requiring the victim to load a page (UI:R), no privileges (PR:N), confidentiality-only disclosure (C:H, I:N/A:N), scope unchanged.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/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
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Analysis Generated
Jul 22, 2026 - 17:07 vuln.today
CVSS changed
Jul 22, 2026 - 16:22 NVD
7.5 (HIGH)
CVE Published
Jul 21, 2026 - 12:37 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 21, 2026 - 12:37 cve.org
HIGH 7.5

DescriptionCVE.org

Information disclosure in the Privacy component in Firefox for Android. This vulnerability was fixed in Firefox 153.

AnalysisAI

Information disclosure in the Privacy component of Mozilla Firefox for Android allows remote attackers to expose sensitive user data, with the flaw carrying a high confidentiality impact (CVSS 7.5). Mozilla self-reported and fixed the issue in Firefox 153 per advisory MFSA2026-68; there is no public exploit identified at time of analysis, and the EPSS probability is low (0.14%, 4th percentile). The Privacy component context suggests leakage of protected browsing state or user data that the browser is designed to isolate.

Technical ContextAI

The vulnerability sits in the Privacy component of the Gecko-based Firefox browser on the Android platform, and is classified as CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). The affected CPE is cpe:2.3:a:mozilla:firefox, indicating the Firefox application itself rather than an OS-level component. Privacy-component information-disclosure flaws in browsers typically arise from insufficient isolation between origins, sites, or browsing modes - for example leakage of history, cache, cookies, private-browsing state, or other identifiers that the browser should keep confined. The exact leak channel is not detailed in the sparse Mozilla description, which references Bugzilla bug 2021964 (not publicly readable in the provided data) and advisory MFSA2026-68.

RemediationAI

Vendor-released patch: Firefox 153. Update Firefox for Android to version 153 or later via the Google Play Store (or your managed app distribution channel) to remediate; for enterprise/MDM fleets, push the 153+ build and enforce auto-update so users do not remain on vulnerable versions. No component-level workaround is documented by Mozilla, and because the flaw is in the browser's Privacy component there is no reliable configuration toggle that eliminates it; as an interim compensating control, advise users to avoid untrusted sites and consider restricting the browser via MDM until updated, accepting the usability trade-off. Consult the advisory at https://www.mozilla.org/security/advisories/mfsa2026-68/ for authoritative fix details.

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Same weakness CWE-200 – Information Exposure

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Vendor StatusVendor

SUSE

Severity: Critical
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected

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EUVD-2026-46209 vulnerability details – vuln.today
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