CVE-2026-45609

mcp-security: Unvalidated URL Fetching (SSRF)

Published May 29, 2026 CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-qjp4-4jvr-xqg3 Spring AI MCP Security: Unvalidated URL Fetching (SSRF)
History
Type Values Removed Values Added
First Time appeared Springaicommunity
Springaicommunity mcp Security
CPEs cpe:2.3:a:springaicommunity:mcp_security:*:*:*:*:*:*:*:*
Vendors & Products Springaicommunity
Springaicommunity mcp Security
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Spring-ai-community
Spring-ai-community mcp-security
Vendors & Products Spring-ai-community
Spring-ai-community mcp-security
Type Values Removed Values Added
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.
Title mcp-security: Unvalidated URL Fetching (SSRF)
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 2, 2026, 1:21 AM
Reserved
May 12, 2026, 8:31 PM
Status
Analyzed
Published
May 29, 2026, 3:16 PM
Modified
Jul 21, 2026, 12:10 PM