Common Weakness Enumeration
CWE-939
Weakness AllowedImproper Authorization in Handler for Custom URL Scheme
Abstraction: Base · Status: Incomplete
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.
Mobile platforms and other architectures allow the use of custom URL schemes to facilitate communication between applications. In the case of iOS, this is the only method to do inter-application communication. The implementation is at the developer's discretion which may open security flaws in the application. An example could be potentially dangerous functionality such as modifying files through a custom URL scheme.
Mapping guidance
This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.
Modes of introduction
Implementation
REALIZATION: This weakness is caused during implementation of an architectural security tactic.
Detection methods
Automated Static Analysis
Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)
Content history
Submission: CWE Content Team
· MITRE
· 2014-01-14
· CWE 2.6
Modification: CWE Content Team
· MITRE
· 2017-01-19
· CWE 2.10
updated Relationships
Modification: CWE Content Team
· MITRE
· 2017-11-08
· CWE 3.0
updated Modes_of_Introduction, References, Relationships
Modification: CWE Content Team
· MITRE
· 2020-02-24
· CWE 4.0
updated Applicable_Platforms, Relationships
Modification: CWE Content Team
· MITRE
· 2020-06-25
· CWE 4.1
updated Potential_Mitigations
Modification: CWE Content Team
· MITRE
· 2021-03-15
· CWE 4.4
updated Demonstrative_Examples
Modification: CWE Content Team
· MITRE
· 2023-01-31
· CWE 4.10
updated Description
Modification: CWE Content Team
· MITRE
· 2023-04-27
· CWE 4.11
updated References, Relationships
Modification: CWE Content Team
· MITRE
· 2023-06-29
· CWE 4.12
updated Mapping_Notes
Modification: CWE Content Team
· MITRE
· 2025-04-03
· CWE 4.17
updated Demonstrative_Examples
Modification: CWE Content Team
· MITRE
· 2025-12-11
· CWE 4.19
updated Common_Consequences, Detection_Factors, Relationships, Weakness_Ordinalities
57 vulnerabilities reference this CWE, most recent first.
CVE-2026-118677 (GCVE-0-2026-118677)
Vulnerability from cvelistv5 – Published: 2026-10-28 18:59 – Updated: 2026-11-03 13:20
VLAI
EPSS
VEX
Title
n8n before 2.41.4 and 2.42.1 Local Gateway Deep-Link Silent Re-pairing to Attacker Instance
Summary
n8n before 2.41.4 and 2.42.x before 2.42.1 contains a missing confirmation vulnerability in the Local Gateway desktop app that allows its deep-link connect handler to silently re-pair the app with a different n8n instance. Attackers can lure users running the Local Gateway into opening a crafted n8n-computer-use:// link to connect their computer to an attacker-controlled instance, inheriting previously granted permissions and acting on the computer through the gateway.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 13:19 UTC
CWE
- CWE-939 - Improper Authorization in Handler for Custom URL Scheme
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | vendor-advisory |
| https://www.vulncheck.com/advisories/n8n-before-2… | third-party-advisory |
Impacted products
Date Public
2026-10-14 00:00
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CVE-2026-113411 (GCVE-0-2026-113411)
Vulnerability from cvelistv5 – Published: 2026-10-20 14:30 – Updated: 2026-10-22 21:27 X_Open Source
VLAI
EPSS
VEX
Title
Nerimity Desktop Window Open mainWindow.js shell.openExternal improper authorization in handler for custom url scheme
Summary
A vulnerability was found in Nerimity Desktop up to 2.2.2. Affected by this issue is the function shell.openExternal of the file src/mainWindow.js of the component Window Open Handler. The manipulation of the argument url results in improper authorization in handler for custom url scheme. The attack can be executed remotely. The exploit has been made public and could be used. Upgrading to version 2.3.3 can resolve this issue. The patch is identified as f4df21bbc290f6c1956d899cf4da9e963074a6e4. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-22 21:27 UTC
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/422677 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/422677/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-113411 | third-party-advisory |
| https://vuldb.com/submit/1013190 | third-party-advisory |
| https://github.com/LeoWSY-hashblue/cve-electron-2… | exploit |
| https://github.com/Nerimity/nerimity-desktop/comm… | broken-linkpatch |
| https://github.com/Nerimity/nerimity-desktop/rele… | patch |
Impacted products
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CVE-2026-96614 (GCVE-0-2026-96614)
Vulnerability from cvelistv5 – Published: 2026-10-15 08:25 – Updated: 2026-10-15 14:19
VLAI
EPSS
VEX
Summary
"ゲオアプリ" provided by GEO CORPORATION is vulnerable to improper authorization in handler for a custom URL scheme. An attacker may be able to cause the application's in-app browser to access an arbitrary website, potentially leading to phishing attacks or disclosure of a service's session ID.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 14:19 UTC
CWE
- CWE-939 - Improper authorization in handler for custom URL scheme
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| GEO CORPORATION | "ゲオアプリ" for Android |
Affected:
0 , ≤ 11.8.6
(semver)
|
|
| GEO CORPORATION | "ゲオアプリ" for iOS |
Affected:
0 , ≤ 11.8.6
(semver)
|
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CVE-2026-92862 (GCVE-0-2026-92862)
Vulnerability from cvelistv5 – Published: 2026-10-08 02:54 – Updated: 2026-10-08 12:29
VLAI
EPSS
VEX
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
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
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wavedash Co., Ltd. | Ticket Ryutsu Center |
Affected:
0 , ≤ 4.1.9
(semver)
|
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CVE-2026-91901 (GCVE-0-2026-91901)
Vulnerability from cvelistv5 – Published: 2026-11-02 20:11 – Updated: 2026-11-04 14:57
VLAI
EPSS
VEX
Summary
Dell Alienware Command Center (AWCC), versions prior to 6.14.54.0, contain an Improper Authorization in Handler for Custom URL Scheme vulnerability. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to Client-Side Request Forgery.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 14:56 UTC
CWE
- CWE-939 - Improper Authorization in Handler for Custom URL Scheme
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00051224… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | Alienware Command Center (AWCC) |
Affected:
0 , < 6.14.54.0
(semver)
|
Date Public
2026-11-02 20:09
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CVE-2026-91900 (GCVE-0-2026-91900)
Vulnerability from cvelistv5 – Published: 2026-11-02 20:04 – Updated: 2026-11-03 15:39
VLAI
EPSS
VEX
Summary
Dell Alienware Command Center (AWCC), version(s) Versions up to and including 6.14.20.0, contain(s) an Improper Authorization in Handler for Custom URL Scheme vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Command execution, Launch of phishing attacks, and Remote execution.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 04:56 UTC
CWE
- CWE-939 - Improper Authorization in Handler for Custom URL Scheme
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00051224… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | Alienware Command Center (AWCC) |
Affected:
0 , < 6.14.54.0
(semver)
|
Date Public
2026-11-02 20:03
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CVE-2026-90631 (GCVE-0-2026-90631)
Vulnerability from cvelistv5 – Published: 2026-11-04 11:04 – Updated: 2026-11-04 13:56
VLAI
EPSS
VEX
Title
Apache OpenOffice: Remote document loaded without prompt, possibiy leaking environment variables
Summary
Apache OpenOffice documents can contain links. A missing Authorization vulnerability in Apache OpenOffice allowed an attacker to craft a document that would cause external links
to be loaded without prompt, possibly transferring the contents of environment variables in the process.
This issue affects Apache OpenOffice: through 4.1.16.
Users are recommended to upgrade to version 4.1.17, which fixes the issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 13:55 UTC
CWE
- CWE-939 - Improper authorization in handler for custom URL scheme
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread.html/j19rrk8jwrlg… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/1… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache OpenOffice |
Affected:
0 , ≤ 4.1.16
(semver)
|
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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
EPSS
VEX
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)
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
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Digital Agency | Android App "Myna Point" |
Affected:
0 , ≤ 2.0.6
(semver)
|
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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
EPSS
VEX
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)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 20:51 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/home-assistant/core/security/a… | x_refsource_CONFIRM |
| https://github.com/home-assistant/android/pull/6955 | x_refsource_MISC |
| https://github.com/home-assistant/android/commit/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| home-assistant | core |
Affected:
< 2026.6.1
|
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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
EPSS
VEX
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)
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
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zoom Communications | Zoom Workplace |
Affected:
0 , < 7.2.1
(custom)
|
Date Public
2026-10-13 12:00
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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.