https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Wed, 07 Oct 2026 17:44:31 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-318963 EUVD-2026-318963 https://cve.radiocsirt.org/vuln/euvd-2026-318963 https://cve.radiocsirt.org/vuln/fkie_cve-2026-44427 <p>The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. From 1.1.0 to 1.7.4, the TrailingSlashMiddleware in internal/api/server.go is vulnerable to an open redirect attack. An attacker can craft a URL with a protocol-relative path (e.g., //evil.com/) that, after trailing slash removal, results in a Location header of //evil.com — which browsers interpret as an absolute URL to an external domain. This vulnerability is fixed in 1.7.5.</p> <p>The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. From 1.1.0 to 1.7.4, the TrailingSlashMiddleware in internal/api/server.go is vulnerable to an open redirect attack. An attacker can craft a URL with a protocol-relative path (e.g., //evil.com/) that, after trailing slash removal, results in a Location header of //evil.com — which browsers interpret as an absolute URL to an external domain. This vulnerability is fixed in 1.7.5.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2026-44427 https://cve.radiocsirt.org/vuln/ghsa-v8vw-gw5j-w7m6 <p><strong>Affected:</strong> Go: github.com/modelcontextprotocol/registry</p> <p>### Summary The TrailingSlashMiddleware in internal/api/server.go is vulnerable to an open redirect attack. An attacker can craft a URL with a protocol-relative path (e.g., //evil.com/) that, after trailing slash removal, results in a Location header of //evil.com — which browsers interpret as an absolute URL to an external domain.</p> <p>### Details The TrailingSlashMiddleware strips trailing slashes from request paths and issues a 308 Permanent Redirect to the cleaned path. However, it does not validate or sanitize the resulting path before using it as the redirect target.</p> <p>When a request is made with a path like //evil.com/, the middleware processes it as follows:</p> <p>### PoC 1. Start the registry server locally or identify a deployed instance 2. Send a request with a double-slash path followed by an external domain: `curl -v https://&lt;registry-host&gt;//evil.com/` &lt;img width=&#34;3066&#34; height=&#34;969&#34; alt=&#34;image&#34; src=&#34;https://github.com/user-attachments/assets/a5305f00-29bf-4708-952a-478d608f2074&#34; /&gt; 3. Observe the 308 Permanent Redirect response with Location: //evil.com: 4. When accessed in a browser, the user is redirected to https://evil.com</p> <p>### Impact **Phishing**: Attackers can abuse the trusted registry domain to redirect users to credential-harvesting pages **Malware distribution**: Redirect users to sites serving malicious downloads **Trust abuse:** Links originating from the official MCP Registry domain carry implicit trust</p> <p><strong>Affected:</strong> Go: github.com/modelcontextprotocol/registry</p> <p>### Summary The TrailingSlashMiddleware in internal/api/server.go is vulnerable to an open redirect attack. An attacker can craft a URL with a protocol-relative path (e.g., //evil.com/) that, after trailing slash removal, results in a Location header of //evil.com — which browsers interpret as an absolute URL to an external domain.</p> <p>### Details The TrailingSlashMiddleware strips trailing slashes from request paths and issues a 308 Permanent Redirect to the cleaned path. However, it does not validate or sanitize the resulting path before using it as the redirect target.</p> <p>When a request is made with a path like //evil.com/, the middleware processes it as follows:</p> <p>### PoC 1. Start the registry server locally or identify a deployed instance 2. Send a request with a double-slash path followed by an external domain: `curl -v https://&lt;registry-host&gt;//evil.com/` &lt;img width=&#34;3066&#34; height=&#34;969&#34; alt=&#34;image&#34; src=&#34;https://github.com/user-attachments/assets/a5305f00-29bf-4708-952a-478d608f2074&#34; /&gt; 3. Observe the 308 Permanent Redirect response with Location: //evil.com: 4. When accessed in a browser, the user is redirected to https://evil.com</p> <p>### Impact **Phishing**: Attackers can abuse the trusted registry domain to redirect users to credential-harvesting pages **Malware distribution**: Redirect users to sites serving malicious downloads **Trust abuse:** Links originating from the official MCP Registry domain carry implicit trust</p> https://cve.radiocsirt.org/vuln/ghsa-v8vw-gw5j-w7m6