What’s Vulnerable › Vulnerabilities
CVE-2026-45609: mcp-security: Unvalidated URL Fetching (SSRF)
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-29 · updated 2026-07-21
- Weakness: CWE-918
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
- spring-ai-community mcp-security: from 0.1.0 before 0.1.9 — fixed in 0.1.9
How to fix
Upgrade to a fixed version: spring-ai-community mcp-security 0.1.9. Check the vendor advisory for mitigations.
References
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