Common Weakness Enumeration
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CWE-942
Permissive Cross-domain Security Policy with Untrusted Domains
The product uses a web-client protection mechanism such as a Content Security Policy (CSP) or cross-domain policy file, but the policy includes untrusted domains with which the web client is allowed to communicate.
CVE-2026-8919 (GCVE-0-2026-8919)
Vulnerability from cvelistv5 – Published: 2026-07-15 02:00 – Updated: 2026-07-15 12:34
VLAI
EPSS
VEX
Summary
Permissive Cross-domain Security Policy with Untrusted Domains in ASUS GameSDK allows a remote user to obtain a local user’s NTLM hash by convincing the user to visit a crafted web page that sends a request containing a UNC path to the application’s local service endpoint. This can result in information disclosure or data tampering, may cause GameSDK to become unavailable, and may also enable access to the victim’s information on other services.
Refer to the ' Security Update for ASUS GameSDK ' section on the ASUS Security Advisory for more information.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-942 - Permissive Cross-domain Security Policy with Untrusted Domains
Assigner
References
1 reference
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CVE-2026-9739 (GCVE-0-2026-9739)
Vulnerability from cvelistv5 – Published: 2026-05-27 21:38 – Updated: 2026-05-28 13:20
VLAI
EPSS
VEX
Summary
Vulnerable to DNS rebinding attacks when using SSE (http://b/499408790). During the beta phase, we implemented `allowed-origins` and `allowed-hosts` flags to align with MCP security guidelines. However, the hardcoded `Access-Control-Allow-Origin: *` header in the SSE initialization handler was inadvertently retained. This vulnerability specifically impacts users connecting via Toolbox using SSE under specification v2024-11-05.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-942 - Permissive Cross-domain Policy with Untrusted Domains
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MCP Toolbox for Databases |
Affected:
0 , < PR 3054 (Fix CORS bypass)
(custom)
|
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Mitigation
Phases: Architecture and Design, Operation
Strategy: Attack Surface Reduction
Description:
- Define a restrictive Content Security Policy [REF-1486] or cross-domain policy file.
Mitigation
Phases: Architecture and Design, Operation
Strategy: Attack Surface Reduction
Description:
- Avoid using wildcards in the CSP / cross-domain policy file. Any domain matching the wildcard expression will be implicitly trusted, and can perform two-way interaction with the target server.
Mitigation
Phases: Architecture and Design, Operation
Strategy: Environment Hardening
Description:
- For Flash, modify crossdomain.xml to use meta-policy options such as 'master-only' or 'none' to reduce the possibility of an attacker planting extraneous cross-domain policy files on a server.
No CAPEC attack patterns related to this CWE.