ihor-sokoliuk mcp-searxng up to 1.1.x URL Reader src/url-reader.ts web_url_read redirect

Summaryinfo

A vulnerability was found in ihor-sokoliuk mcp-searxng up to 1.1.x. It has been rated as problematic. This affects the function web_url_read of the file src/url-reader.ts of the component URL Reader. Performing a manipulation results in redirect. This vulnerability is cataloged as CVE-2026-54689. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in ihor-sokoliuk mcp-searxng up to 1.1.x. It has been classified as problematic. This affects the function web_url_read of the file src/url-reader.ts of the component URL Reader. The manipulation with an unknown input leads to a redirect vulnerability. CWE is classifying the issue as CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. This is going to have an impact on integrity. The summary by CVE is:

mcp-searxng is a Model Context Protocol server that gives AI assistants web search and URL-reading capabilities through SearXNG. Prior to 1.2.0, the web_url_read URL policy in src/url-reader.ts can be bypassed while MCP_HTTP_HARDEN is enabled and MCP_HTTP_ALLOW_PRIVATE_URLS is not enabled because redirect targets are not revalidated, 0.0.0.0 is not classified as an internal address, and IPv4-mapped IPv6 literals canonicalized to hexadecimal form are not recognized. These inputs allow an attacker-influenced tool call to make the MCP server fetch loopback or internal HTTP resources and return content from local services, private APIs, service-mesh endpoints, or cloud metadata endpoints. The separate hostname-to-private-address case addressed by the earlier partial fix is not part of these residual bypasses. This issue is fixed in version 1.2.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-54689 since 06/16/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1204.001 according to MITRE ATT&CK.

Upgrading to version 1.2.0 eliminates this vulnerability.

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Productinfo

Type

• Artificial Intelligence Software

Vendor

• ihor-sokoliuk

Name

• mcp-searxng

Version

• 1.0
• 1.1

Website

• Product: https://github.com/ihor-sokoliuk/mcp-searxng/

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