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-2026-46685 (GCVE-0-2026-46685)
Vulnerability from cvelistv5 – Published: 2026-05-28 18:41 – Updated: 2026-05-28 19:22
VLAI
Title
RustFS: Reflective CORS with credentials on S3 listener; unauthenticated license metadata endpoint on console
Summary
RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, when RUSTFS_CORS_ALLOWED_ORIGINS is unset, the RustFS S3 listener's ConditionalCorsLayer reflects any request Origin value back as Access-Control-Allow-Origin and also sets Access-Control-Allow-Credentials: true and Access-Control-Allow-Headers: * on responses, including preflight responses and error responses. This creates a permissive cross-domain policy with untrusted origins. A browser visiting an attacker-controlled page can issue credentialed cross-origin requests to a reachable RustFS deployment and read the response when the victim browser has ambient credentials for the RustFS origin, such as saved HTTP Basic Auth credentials, reverse-proxy SSO cookies, or TLS client certificates. This vulnerability is fixed in 1.0.0-beta.2.
Severity
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/rustfs/rustfs/security/advisor… | x_refsource_CONFIRM |
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CVE-2026-5302 (GCVE-0-2026-5302)
Vulnerability from cvelistv5 – Published: 2026-04-08 12:05 – Updated: 2026-04-08 14:10
VLAI
Title
Permissive Cross-domain Policy with Untrusted Domains in coolercontrold
Summary
CORS misconfiguration in CoolerControl/coolercontrold <4.0.0 allows unauthenticated remote attackers to read data and send commands to the service via malicious websites
Severity
6.3 (Medium)
CWE
- CWE-942 - Permissive Cross-domain Policy with Untrusted Domains
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CoolerControl | coolercontrold |
Affected:
2.0.0 , < 4.0.0
(semver)
|
Credits
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CVE-2026-5321 (GCVE-0-2026-5321)
Vulnerability from cvelistv5 – Published: 2026-04-02 04:45 – Updated: 2026-04-02 18:30
VLAI
Title
vanna-ai vanna FastAPI/Flask Server cross-domain policy
Summary
A flaw has been found in vanna-ai vanna up to 2.0.2. Affected by this issue is some unknown functionality of the component FastAPI/Flask Server. Executing a manipulation can lead to permissive cross-domain policy with untrusted domains. The attack can be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/354653 | vdb-entry |
| https://vuldb.com/vuln/354653/cti | signaturepermissions-required |
| https://vuldb.com/submit/780729 | third-party-advisory |
| https://github.com/August829/CVEP/issues/14 | exploitissue-tracking |
Impacted products
Credits
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CVE-2026-6143 (GCVE-0-2026-6143)
Vulnerability from cvelistv5 – Published: 2026-04-13 01:15 – Updated: 2026-04-13 11:59
VLAI
Title
farion1231 cc-switch ProxyServer server.rs cross-domain policy
Summary
A security flaw has been discovered in farion1231 cc-switch up to 3.12.3. Affected by this issue is some unknown functionality of the file src-tauri/src/proxy/server.rs of the component ProxyServer. The manipulation results in permissive cross-domain policy with untrusted domains. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.
Severity
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/357007 | vdb-entry |
| https://vuldb.com/vuln/357007/cti | signaturepermissions-required |
| https://vuldb.com/submit/796145 | third-party-advisory |
| https://github.com/farion1231/cc-switch/issues/1841 | issue-tracking |
| https://github.com/farion1231/cc-switch/pull/1915 | issue-trackingpatch |
| https://github.com/farion1231/cc-switch/issues/18… | exploitissue-tracking |
| https://github.com/farion1231/cc-switch/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| farion1231 | cc-switch |
Affected:
3.12.0
Affected: 3.12.1 Affected: 3.12.2 Affected: 3.12.3 |
Credits
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CVE-2026-6662 (GCVE-0-2026-6662)
Vulnerability from cvelistv5 – Published: 2026-04-20 17:00 – Updated: 2026-04-20 18:09
VLAI
Title
ericc-ch copilot-api Token Endpoint server.ts cors cross-domain policy
Summary
A vulnerability was found in ericc-ch copilot-api up to 0.7.0. The impacted element is the function cors of the file src/server.ts of the component Token Endpoint. Performing a manipulation results in permissive cross-domain policy with untrusted domains. It is possible to initiate the attack remotely. The exploit has been made public and could be used.
Severity
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/358300 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/358300/cti | signaturepermissions-required |
| https://vuldb.com/submit/794601 | third-party-advisory |
| https://github.com/August829/CVEP/issues/31 | exploitissue-tracking |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ericc-ch | copilot-api |
Affected:
0.1
Affected: 0.2 Affected: 0.3 Affected: 0.4 Affected: 0.5 Affected: 0.6 Affected: 0.7.0 |
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CVE-2026-7581 (GCVE-0-2026-7581)
Vulnerability from cvelistv5 – Published: 2026-05-01 13:00 – Updated: 2026-05-01 13:21 X_Open Source
VLAI
Title
alexta69 MeTube CORS Policy main.py on_prepare cross-domain policy
Summary
A security vulnerability has been detected in alexta69 MeTube up to 2026.04.09. This affects the function on_prepare of the file app/main.py of the component CORS Policy. The manipulation leads to permissive cross-domain policy with untrusted domains. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 2026.04.10 is able to mitigate this issue. The identifier of the patch is 0072d3488ae5b8d922d3ee87458d829993742a32. It is recommended to upgrade the affected component.
Severity
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/360528 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/360528/cti | signaturepermissions-required |
| https://vuldb.com/submit/801529 | third-party-advisory |
| https://github.com/az10b/security-advisories/blob… | exploit |
| https://github.com/alexta69/metube/pull/949 | issue-trackingpatch |
| https://github.com/alexta69/metube/commit/0072d34… | patch |
| https://github.com/alexta69/metube/releases/tag/2… | patch |
| https://github.com/alexta69/metube/ | product |
Impacted products
Credits
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CVE-2026-7643 (GCVE-0-2026-7643)
Vulnerability from cvelistv5 – Published: 2026-05-02 14:45 – Updated: 2026-05-04 18:03
VLAI
Title
ChatGPTNextWeb NextChat API Endpoint Next.js cross-domain policy
Summary
A flaw has been found in ChatGPTNextWeb NextChat up to 2.16.1. This impacts an unknown function of the file Next.js of the component API Endpoint. Executing a manipulation can lead to permissive cross-domain policy with untrusted domains. The attack may be launched remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Severity
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/360755 | vdb-entry |
| https://vuldb.com/vuln/360755/cti | signaturepermissions-required |
| https://vuldb.com/submit/806833 | third-party-advisory |
| https://github.com/ChatGPTNextWeb/NextChat/issues/6756 | exploitissue-tracking |
| https://github.com/ChatGPTNextWeb/NextChat/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ChatGPTNextWeb | NextChat |
Affected:
2.16.0
Affected: 2.16.1 |
Credits
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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
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
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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"vendor": "Google",
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"value": "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."
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"cweId": "CWE-942",
"description": "CWE-942: Permissive Cross-domain Policy with Untrusted Domains",
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"url": "https://github.com/googleapis/mcp-toolbox/issues/3053"
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"url": "https://github.com/googleapis/mcp-toolbox/pull/3054"
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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.