ihor-sokoliuk mcp-searxng up to 1.1.x Url Reader src/url-reader.ts assertUrlAllowed server-side request forgery

Summaryinfo

A vulnerability, which was classified as problematic, has been found in ihor-sokoliuk mcp-searxng up to 1.1.x. The impacted element is the function assertUrlAllowed of the file src/url-reader.ts of the component Url Reader. Performing a manipulation results in server-side request forgery. This vulnerability was named CVE-2026-54688. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in ihor-sokoliuk mcp-searxng up to 1.1.x. This affects the function assertUrlAllowed of the file src/url-reader.ts of the component Url Reader. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality. 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, web_url_read passes a caller-supplied URL to the server-side fetch path while assertUrlAllowed() in src/url-reader.ts runs only when MCP_HTTP_HARDEN is enabled, even though MCP_HTTP_HARDEN is disabled by default in src/http-security.ts. In the default configuration, an attacker who influences the URL selected by a user or AI agent can make the server fetch loopback, private-network, or cloud metadata endpoint resources and return their contents into the model context. file:// URLs remain rejected, and the separate DNS-resolution and redirect-validation bypasses are outside this record. This issue is fixed in version 1.2.0.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-54688 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 are known, but no exploit is available.

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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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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