chore(deps): update dependency @modelcontextprotocol/sdk to v1.25.2 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@modelcontextprotocol/sdk (source)	1.25.1 → 1.25.2

GitHub Vulnerability Alerts

CVE-2026-0621

Impact

A ReDoS vulnerability in the UriTemplate class allows attackers to cause denial of service. The partToRegExp() function generates a regex pattern with nested quantifiers (([^/]+(?:,[^/]+)*)) for exploded template variables (e.g., {/id*}, {?tags*}), causing catastrophic backtracking on malicious input.

Who is affected: MCP servers that register resource templates with exploded array patterns and accept requests from untrusted clients.

Attack result: An attacker sends a crafted URI via resources/read request, causing 100% CPU utilization, server hang/crash, and denial of service for all clients.

Affected Versions

All versions of @modelcontextprotocol/sdk prior to the patched release.

Patches

v1.25.2 contains b392f02ffcf37c088dbd114fedf25026ec3913d3 the fix modifies the regex pattern to prevent backtracking.

Workarounds

• Avoid using exploded patterns ({/id*}, {?tags*}) in resource templates
• Implement request timeouts and rate limiting
• Validate URIs before processing to reject suspicious patterns

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Release Notes

modelcontextprotocol/typescript-sdk (@​modelcontextprotocol/sdk)

v1.25.2

Compare Source

What's Changed

• ci: trigger workflow on v1.x branch by @​felixweinberger in #​1319
• fix: README badges links destinations by @​antonpk1 in #​907
• fix: prevent ReDoS in UriTemplate regex patterns (v1.x backport) by @​pcarleton in #​1365

New Contributors

• @​antonpk1 made their first contribution in #​907

Full Changelog: modelcontextprotocol/typescript-sdk@1.25.1...v1.25.2

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