CVE-2026-45609 — mcp-security: Unvalidated URL Fetching (SSRF)
mcp-security provides Security and Authorization support for Model Context Protocol in Spring AI. Prior to 0.1.9, the mcp-security framework fails to implement the mandatory SSR…
Published: 2026-05-29 · CVSS: 7.2 · CVSS 3.1
mcp-security provides Security and Authorization support for Model Context Protocol in Spring AI. Prior to 0.1.9, the mcp-security framework fails to implement the mandatory SSRF mitigations outlined in the Model Context Protocol (MCP) security specifications. Specifically, it processes untrusted URLs for OAuth-related discovery and metadata without verifying if the targets are malicious or internal to the network. This only affects installations with Dynamic Client Registration (DCR) enabled This vulnerability is fixed in 0.1.9.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7