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CWE-939

Improper Authorization in Handler for Custom URL Scheme

21 CVEs Avg CVSS 5.8 MITRE
1
CRITICAL
6
HIGH
10
MEDIUM
4
LOW
2
POC
0
KEV

Monthly

CVE-2026-12190 MEDIUM This Month

Improper authorization in the custom URL scheme handler of Genspark AI Workspace App 2.8.4 on Android allows a local low-privileged attacker to invoke restricted application functionality via the ai.mainfunc.genspark component without proper access control. The flaw is classified under CWE-939, affecting inter-app communication on Android where the URL scheme handler fails to verify the caller's authorization. No patch is available as the vendor did not respond to responsible disclosure; no public exploit or CISA KEV confirmation exists at time of analysis.

Google Information Disclosure Ai Workspace App
NVD VulDB GitHub
CVSS 4.0
4.8
EPSS
0.1%
CVE-2026-12189 LOW POC Monitor

Improper authorization in Moovit Bus & Public Transit App 1.18 on Android exposes the com.tranzmate custom URL scheme handler to invocation by any locally installed application without proper authorization checks, enabling information disclosure and limited unauthorized manipulation of app functionality. The vulnerability is classified as CWE-939 and is restricted to local attack vectors, meaning a co-resident malicious application on the same Android device is required to trigger it. A proof-of-concept exploit has been publicly released via GitHub and Google Drive, and the vendor did not respond to responsible disclosure - no patch is confirmed available at time of analysis.

Google Information Disclosure Bus Public Transit App
NVD VulDB GitHub
CVSS 4.0
1.9
EPSS
0.1%
CVE-2026-53408 HIGH PATCH This Week

Privilege escalation in Zoom Workplace mobile clients (Android before 7.0.4, iOS before 7.0.3) stems from improper authorization in the handler for a custom URL scheme, allowing a remote attacker to elevate privileges over network access. The CVSS 8.1 rating reflects high confidentiality and integrity impact with low-complexity exploitation, though no public exploit identified at time of analysis and the issue is not on the CISA KEV list.

Google Privilege Escalation Apple Zoom Workplace
NVD VulDB
CVSS 3.1
8.1
EPSS
0.0%
CVE-2026-53407 CRITICAL PATCH Act Now

Privilege escalation in the Zoom Workplace mobile app (Android before 7.0.4, iOS before 7.0.3) stems from improper authorization in the handler that processes the app's custom URL scheme, allowing an unauthenticated actor to elevate privileges via network access. Zoom self-reported and patched the flaw, and no public exploit identified at time of analysis; EPSS remains very low (0.04%, 12th percentile) and CISA SSVC marks exploitation as none, indicating no observed activity despite the 9.8 CVSS score.

Google Privilege Escalation Apple Zoom Workplace
NVD VulDB
CVSS 3.1
9.8
EPSS
0.0%
CVE-2026-12065 LOW POC Monitor

Improper authorization in the WebView URL Handler of the Groww Stock, Mutual Fund, Gold App for Android (all versions up to build 20260805) allows a low-privileged attacker with physical device access to invoke custom URL scheme handlers without proper authorization, enabling unauthorized in-app navigation or bypass of client-side access controls. The CVSS 4.0 score of 0.3 reflects severe exploitation constraints: physical access is mandatory, attack complexity is high, and impact is limited to low integrity compromise with no confirmed confidentiality exposure. A public proof-of-concept is available on GitHub and Google Drive; the vulnerability is not listed in CISA KEV and no vendor patch has been confirmed at time of analysis.

Google Information Disclosure Stock Mutual Fund Gold App
NVD VulDB GitHub
CVSS 4.0
0.3
EPSS
0.0%
CVE-2026-6445 HIGH This Week

Information disclosure in Pure Storage FlashArray Purity (versions 6.5.0-6.5.8 and 6.10.0-6.10.5) allows an authenticated low-privileged user to retrieve sensitive data via insufficiently filtered data paths. The flaw carries a CVSS 4.0 score of 8.7 with high confidentiality, integrity, and availability impact, but SSVC indicates no public exploitation and the attack is not automatable. No public exploit has been identified at the time of analysis.

Information Disclosure Flasharray
NVD
CVSS 4.0
8.7
EPSS
0.0%
CVE-2026-3471 MEDIUM This Month

Mattermost Desktop App can be repeatedly crashed by malicious server administrators through JavaScript URL injection in pop-up windows. Attackers controlling a Mattermost server can force connected desktop clients to become unusable by exploiting improper URL validation, requiring user interaction (connecting to the malicious server). No public exploit code identified at time of analysis, though the attack method is trivial to implement given the disclosed details.

Mattermost Denial Of Service
NVD VulDB
CVSS 3.1
6.5
EPSS
0.0%
CVE-2026-35394 npm HIGH PATCH NEWS GHSA This Week

Arbitrary Android intent execution in mobile-mcp npm package (versions <0.0.50) allows remote attackers to trigger USSD codes, phone calls, SMS drafting, and content provider access through unvalidated URL schemes passed to adb shell commands. Attack vector exploits AI agent prompt injection: malicious documents can instruct connected AI systems to execute dangerous intents on paired Android devices. CVSS 8.3 (Network/Low complexity/No privileges/User interaction required). Publicly available exploit code exists. Vendor-released patch available (version 0.0.50+).

RCE Google
NVD GitHub
CVSS 3.1
8.3
EPSS
0.0%
CVE-2026-33335 MEDIUM PATCH This Month

The Vikunja Desktop Electron application fails to validate or allowlist URI schemes before passing URLs from window.open() calls to shell.openExternal(), allowing attackers to invoke arbitrary local applications, open files, or trigger custom protocol handlers. Vikunja versions 0.21.0 through 2.1.x are affected, with the vulnerability patched in version 2.2.0. An attacker who can inject links with target="_blank" into user-generated content can exploit this to execute malicious actions on the victim's operating system without user awareness or explicit consent.

Information Disclosure Vikunja
NVD GitHub VulDB
CVSS 4.0
6.4
EPSS
0.0%
CVE-2026-26123 MEDIUM PATCH This Month

Microsoft Authenticator contains an information disclosure vulnerability that allows local attackers to access sensitive data without requiring elevated privileges or user interaction beyond standard operation. The vulnerability stems from improper categorization of security controls, enabling unauthorized disclosure of confidential information on affected systems. No patch is currently available for this issue.

Microsoft Information Disclosure Authenticator
NVD VulDB
CVSS 3.1
5.5
EPSS
0.0%
EPSS 0% CVSS 4.8
MEDIUM This Month

Improper authorization in the custom URL scheme handler of Genspark AI Workspace App 2.8.4 on Android allows a local low-privileged attacker to invoke restricted application functionality via the ai.mainfunc.genspark component without proper access control. The flaw is classified under CWE-939, affecting inter-app communication on Android where the URL scheme handler fails to verify the caller's authorization. No patch is available as the vendor did not respond to responsible disclosure; no public exploit or CISA KEV confirmation exists at time of analysis.

Google Information Disclosure Ai Workspace App
NVD VulDB GitHub
EPSS 0% CVSS 1.9
LOW POC Monitor

Improper authorization in Moovit Bus & Public Transit App 1.18 on Android exposes the com.tranzmate custom URL scheme handler to invocation by any locally installed application without proper authorization checks, enabling information disclosure and limited unauthorized manipulation of app functionality. The vulnerability is classified as CWE-939 and is restricted to local attack vectors, meaning a co-resident malicious application on the same Android device is required to trigger it. A proof-of-concept exploit has been publicly released via GitHub and Google Drive, and the vendor did not respond to responsible disclosure - no patch is confirmed available at time of analysis.

Google Information Disclosure Bus Public Transit App
NVD VulDB GitHub
EPSS 0% CVSS 8.1
HIGH PATCH This Week

Privilege escalation in Zoom Workplace mobile clients (Android before 7.0.4, iOS before 7.0.3) stems from improper authorization in the handler for a custom URL scheme, allowing a remote attacker to elevate privileges over network access. The CVSS 8.1 rating reflects high confidentiality and integrity impact with low-complexity exploitation, though no public exploit identified at time of analysis and the issue is not on the CISA KEV list.

Google Privilege Escalation Apple +1
NVD VulDB
EPSS 0% CVSS 9.8
CRITICAL PATCH Act Now

Privilege escalation in the Zoom Workplace mobile app (Android before 7.0.4, iOS before 7.0.3) stems from improper authorization in the handler that processes the app's custom URL scheme, allowing an unauthenticated actor to elevate privileges via network access. Zoom self-reported and patched the flaw, and no public exploit identified at time of analysis; EPSS remains very low (0.04%, 12th percentile) and CISA SSVC marks exploitation as none, indicating no observed activity despite the 9.8 CVSS score.

Google Privilege Escalation Apple +1
NVD VulDB
EPSS 0% CVSS 0.3
LOW POC Monitor

Improper authorization in the WebView URL Handler of the Groww Stock, Mutual Fund, Gold App for Android (all versions up to build 20260805) allows a low-privileged attacker with physical device access to invoke custom URL scheme handlers without proper authorization, enabling unauthorized in-app navigation or bypass of client-side access controls. The CVSS 4.0 score of 0.3 reflects severe exploitation constraints: physical access is mandatory, attack complexity is high, and impact is limited to low integrity compromise with no confirmed confidentiality exposure. A public proof-of-concept is available on GitHub and Google Drive; the vulnerability is not listed in CISA KEV and no vendor patch has been confirmed at time of analysis.

Google Information Disclosure Stock Mutual Fund Gold App
NVD VulDB GitHub
EPSS 0% CVSS 8.7
HIGH This Week

Information disclosure in Pure Storage FlashArray Purity (versions 6.5.0-6.5.8 and 6.10.0-6.10.5) allows an authenticated low-privileged user to retrieve sensitive data via insufficiently filtered data paths. The flaw carries a CVSS 4.0 score of 8.7 with high confidentiality, integrity, and availability impact, but SSVC indicates no public exploitation and the attack is not automatable. No public exploit has been identified at the time of analysis.

Information Disclosure Flasharray
NVD
EPSS 0% CVSS 6.5
MEDIUM This Month

Mattermost Desktop App can be repeatedly crashed by malicious server administrators through JavaScript URL injection in pop-up windows. Attackers controlling a Mattermost server can force connected desktop clients to become unusable by exploiting improper URL validation, requiring user interaction (connecting to the malicious server). No public exploit code identified at time of analysis, though the attack method is trivial to implement given the disclosed details.

Mattermost Denial Of Service
NVD VulDB
EPSS 0% CVSS 8.3
HIGH PATCH This Week

Arbitrary Android intent execution in mobile-mcp npm package (versions <0.0.50) allows remote attackers to trigger USSD codes, phone calls, SMS drafting, and content provider access through unvalidated URL schemes passed to adb shell commands. Attack vector exploits AI agent prompt injection: malicious documents can instruct connected AI systems to execute dangerous intents on paired Android devices. CVSS 8.3 (Network/Low complexity/No privileges/User interaction required). Publicly available exploit code exists. Vendor-released patch available (version 0.0.50+).

RCE Google
NVD GitHub
EPSS 0% CVSS 6.4
MEDIUM PATCH This Month

The Vikunja Desktop Electron application fails to validate or allowlist URI schemes before passing URLs from window.open() calls to shell.openExternal(), allowing attackers to invoke arbitrary local applications, open files, or trigger custom protocol handlers. Vikunja versions 0.21.0 through 2.1.x are affected, with the vulnerability patched in version 2.2.0. An attacker who can inject links with target="_blank" into user-generated content can exploit this to execute malicious actions on the victim's operating system without user awareness or explicit consent.

Information Disclosure Vikunja
NVD GitHub VulDB
EPSS 0% CVSS 5.5
MEDIUM PATCH This Month

Microsoft Authenticator contains an information disclosure vulnerability that allows local attackers to access sensitive data without requiring elevated privileges or user interaction beyond standard operation. The vulnerability stems from improper categorization of security controls, enabling unauthorized disclosure of confidential information on affected systems. No patch is currently available for this issue.

Microsoft Information Disclosure Authenticator
NVD VulDB

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