Common Weakness Enumeration

CWE-939

Allowed

Improper Authorization in Handler for Custom URL Scheme

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

The product uses a handler for a custom URL scheme, but it does not properly restrict which actors can invoke the handler using the scheme.

46 vulnerabilities reference this CWE, most recent first.

CVE-2026-92862 (GCVE-0-2026-92862)

Vulnerability from cvelistv5 – Published: 2026-10-08 02:54 – Updated: 2026-10-08 12:29
VLAI
Summary
The Android application "Ticket Ryutsu Center" improperly handles custom URL schemes, allowing a malicious application to cause access to an arbitrary website via a crafted Intent.
Severity
3.3 (Low)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.6 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 12:26 UTC
CWE
  • CWE-939 - Improper authorization in handler for custom URL scheme
Assigner
jpcert CNA under the jpcert root
CNA scorecard C 64/100 over 186 records in the last 180 days details
References
Impacted products
Vendor Product Version
Wavedash Co., Ltd. Ticket Ryutsu Center Affected: 0 , ≤ 4.1.9 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-73335 (GCVE-0-2026-73335)

Vulnerability from cvelistv5 – Published: 2026-08-26 04:54 – Updated: 2026-08-26 14:09
VLAI
Summary
Android application "Myna Point" is vulnerable to Improper Authorization in Handler for Custom URL Scheme (CWE-939). A malicious application installed on the user's Android device may exploit the affected application's functionality through an Intent, potentially allowing arbitrary JavaScript to be executed within the affected application.
Severity
5.3 (Medium)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
4.6 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 14:09 UTC
CWE
  • CWE-939 - Improper authorization in handler for custom URL scheme
Assigner
jpcert CNA under the jpcert root
CNA scorecard C 64/100 over 186 records in the last 180 days details
References
Impacted products
Vendor Product Version
Digital Agency Android App "Myna Point" Affected: 0 , ≤ 2.0.6 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-59717 (GCVE-0-2026-59717)

Vulnerability from cvelistv5 – Published: 2026-08-07 20:19 – Updated: 2026-08-07 21:01
VLAI
Title
Home Assistant Companion: `homeassistant://invite` Deep Link Credential Phishing
Summary
Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.6.1, the Android Companion app is vulnerable to an open redirect. The app passes the URL fragment from a homeassistant://invite deep link into the onboarding flow without ever displaying the destination hostname. Because no screen in the invitation or onboarding flow shows the parsed server URL before onboarding commits to it, a victim has no way to distinguish a legitimate invite from a malicious one. An attacker can craft an invite so that a single tap on the legitimate-looking "Connect to my Home Assistant server" button opens their /auth/authorize endpoint in the URL-less onboarding WebView, presenting a look-alike login page that captures the victim's credentials. Since invitations are intended to onboard brand-new users, targets are especially unlikely to notice the substitution. This issue is fixed in version 2026.6.1.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 20:51 UTC
CWE
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
  • CWE-939 - Improper Authorization in Handler for Custom URL Scheme
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7637 records in the last 180 days details
References
Impacted products
Vendor Product Version
home-assistant core Affected: < 2026.6.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-53418 (GCVE-0-2026-53418)

Vulnerability from cvelistv5 – Published: 2026-10-13 14:15 – Updated: 2026-10-14 03:59
VLAI
Summary
Improper Authorization in Handler for Custom URL Scheme in Zoom Workplace for Android before version 7.2.1 may allow an unauthenticated user to conduct an escalation of privilege via network access.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 00:00 UTC
CWE
  • CWE-939 - Improper authorization in handler for custom URL scheme
Assigner
Zoom CNA under the mitre root
CNA scorecard C 60/100 over 18 records in the last 180 days details
References
Impacted products
Vendor Product Version
Zoom Communications Zoom Workplace Affected: 0 , < 7.2.1 (custom)
Create a notification for this product.
Date Public
2026-10-13 12:00
Show details on NVD website
To clipboard 

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CVE-2026-53408 (GCVE-0-2026-53408)

Vulnerability from cvelistv5 – Published: 2026-06-12 17:57 – Updated: 2026-06-16 13:13
VLAI
Summary
Improper Authorization in Handler for Custom URL Scheme in Zoom Workplace before version 7.0.4 for Android and before 7.0.3 for iOS may allow an unauthenticated user to conduct an escalation of privilege via network access.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 03:55 UTC
CWE
  • CWE-939 - Improper authorization in handler for custom URL scheme
Assigner
Zoom CNA under the mitre root
CNA scorecard C 60/100 over 18 records in the last 180 days details
References
Impacted products
Vendor Product Version
Zoom Communications Zoom Workplace Affected: 0 , < 7.0.4 (custom)
Create a notification for this product.
Date Public
2026-06-10 12:00
Show details on NVD website
To clipboard 

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CVE-2026-53407 (GCVE-0-2026-53407)

Vulnerability from cvelistv5 – Published: 2026-06-12 17:56 – Updated: 2026-06-16 03:55
VLAI
Summary
Improper Authorization in Handler for Custom URL Scheme in Zoom Workplace before version 7.0.4 for Android and before 7.0.3 for iOS may allow an unauthenticated user to conduct an escalation of privilege via network access.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-15 00:00 UTC
CWE
  • CWE-939 - Improper authorization in handler for custom URL scheme
Assigner
Zoom CNA under the mitre root
CNA scorecard C 60/100 over 18 records in the last 180 days details
References
Impacted products
Vendor Product Version
Zoom Communications Zoom Workplace Affected: 0 , < 7.0.4 (custom)
Create a notification for this product.
Date Public
2026-06-10 12:00
Show details on NVD website
To clipboard 

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CVE-2026-35394 (GCVE-0-2026-35394)

Vulnerability from cvelistv5 – Published: 2026-04-06 20:52 – Updated: 2026-04-07 15:09
VLAI
Title
Mobile Next has Arbitrary Android Intent Execution via mobile_open_url
Summary
Mobile Next is an MCP server for mobile development and automation. Prior to 0.0.50, the mobile_open_url tool in mobile-mcp passes user-supplied URLs directly to Android's intent system without any scheme validation, allowing execution of arbitrary Android intents, including USSD codes, phone calls, SMS messages, and content provider access. This vulnerability is fixed in 0.0.50.
Severity
8.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-07 14:52 UTC
CWE
  • CWE-939 - Improper Authorization in Handler for Custom URL Scheme
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7637 records in the last 180 days details
References
Impacted products
Vendor Product Version
mobile-next mobile-mcp Affected: < 0.0.50
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-33335 (GCVE-0-2026-33335)

Vulnerability from cvelistv5 – Published: 2026-03-24 15:07 – Updated: 2026-03-25 13:41
VLAI
Title
Vikunja Desktop allows arbitrary local application invocation via unvalidated shell.openExternal
Summary
Vikunja is an open-source self-hosted task management platform. Starting in version 0.21.0 and prior to version 2.2.0, the Vikunja Desktop Electron wrapper passes URLs from `window.open()` calls directly to `shell.openExternal()` without any validation or protocol allowlisting. An attacker who can place a link with `target="_blank"` (or that otherwise triggers `window.open`) in user-generated content can cause the victim's operating system to open arbitrary URI schemes, invoking local applications, opening local files, or triggering custom protocol handlers. Version 2.2.0 patches the issue.
Severity
6.4 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-25 13:41 UTC
CWE
  • CWE-939 - Improper Authorization in Handler for Custom URL Scheme
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7637 records in the last 180 days details
References
Impacted products
Vendor Product Version
go-vikunja vikunja Affected: >= 0.21.0, < 2.2.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-26123 (GCVE-0-2026-26123)

Vulnerability from cvelistv5 – Published: 2026-03-10 19:01 – Updated: 2026-06-19 18:18
VLAI
Title
Microsoft Authenticator Information Disclosure Vulnerability
Summary
Cwe is not in rca categories in Microsoft Authenticator allows an unauthorized attacker to disclose information locally.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 16:08 UTC
CWE
  • CWE-939 - Improper Authorization in Handler for Custom URL Scheme
Assigner
microsoft CNA under the mitre root
CNA scorecard B 82/100 over 3924 records in the last 180 days details
References
Impacted products
Date Public
2026-03-10 14:00
Show details on NVD website
To clipboard 

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CVE-2026-12190 (GCVE-0-2026-12190)

Vulnerability from cvelistv5 – Published: 2026-06-14 22:45 – Updated: 2026-06-15 10:37
VLAI
Title
Genspark AI Workspace App ai.mainfunc.genspark improper authorization in handler for custom url scheme
Summary
A vulnerability has been found in Genspark AI Workspace App 2.8.4 on Android. This vulnerability affects unknown code of the component ai.mainfunc.genspark. The manipulation leads to improper authorization in handler for custom url scheme. The attack can only be performed from a local environment. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
5.3 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
5.3 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-15 10:37 UTC
CWE
  • CWE-939 - Improper Authorization in Handler for Custom URL Scheme
  • CWE-285 - Improper Authorization
Assigner
VulDB CNA under the mitre root
CNA scorecard B 82/100 over 3880 records in the last 180 days details
References
Impacted products
Vendor Product Version
Genspark AI Workspace App Affected: 2.8.4
    cpe:2.3:a:genspark:ai_workspace_app:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Actuator (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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Mitigation
Architecture and Design
  • Utilize a user prompt pop-up to authorize potentially harmful actions such as those modifying data or dealing with sensitive information.
  • When designing functionality of actions in the URL scheme, consider whether the action should be accessible to all mobile applications, or if an allowlist of applications to interface with is appropriate.

No CAPEC attack patterns related to this CWE.

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