TI-2026-33355 Aliases CVE-2026-45609 GHSA-qjp4-4jvr-xqg3

mcp-security: Unvalidated URL Fetching (SSRF)

LOW 37CWE-918Published 2026-05-29 · Updated 2026-06-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00207 10th percentileScored 2026-11-07

Fix Fixed mcp-security (spring-ai-community): 0.1.9org.springaicommunity:mcp-client-security (Maven): 0.1.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
spring-ai-community	mcp-security	before 0.1.9	0.1.9	Patch available	CNA
—	org.springaicommunity:mcp-client-security (Maven)	before 0.1.9	0.1.9	Patch available	GHSA-qjp4-4jvr-xqg3

mcp-security Vendorspring-ai-community Affected before 0.1.9 Fixed in 0.1.9 Patch available CNA
org.springaicommunity:mcp-client-security (Maven) Vendor— Affected before 0.1.9 Fixed in 0.1.9 Patch available GHSA-qjp4-4jvr-xqg3

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:springaicommunity:mcp_security::::::::	0.1.0 to before 0.1.9	Vulnerable	spring-ai-community

cpe:2.3:a:springaicommunity:mcp_security:*:*:*:*:*:*:*:* Versions 0.1.0 to before 0.1.9 Vulnerable ·spring-ai-community

Remediation

Fix · CNA mcp-security (spring-ai-community) Fixed in 0.1.9
Fix · GHSA-qjp4-4jvr-xqg3 org.springaicommunity:mcp-client-security (Maven) Fixed in 0.1.9 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-45609
2026-10-03 Alias added: GHSA-qjp4-4jvr-xqg3

References

Advisory 2

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences