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OpenAdvisories
High · 7.2 CVE-2026-45609 EUVD-2026-33323GHSA-qjp4-4jvr-xqg3

mcp-security: Unvalidated URL Fetching (SSRF)

Published May 29, 2026 · Updated Jun 2, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
spring-ai-community mcp-security < 0.1.9 —

Affected packages

EcosystemPackageAffectedFixedRecord
Maven org.springaicommunity:mcp-client-security < 0.1.9 0.1.9 GHSA-qjp4-4jvr-xqg3

References