chore(deps): update dependency @modelcontextprotocol/sdk to v1.24.0 [security] - autoclosed

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@modelcontextprotocol/sdk (source)	1.22.0 -> 1.24.0

GitHub Vulnerability Alerts

CVE-2025-66414

The Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication with StreamableHTTPServerTransport or SSEServerTransport and has not enabled enableDnsRebindingProtection, a malicious website could exploit DNS rebinding to bypass same-origin policy restrictions and send requests to the local MCP server. This could allow an attacker to invoke tools or access resources exposed by the MCP server on behalf of the user in those limited circumstances.

Note that running HTTP-based MCP servers locally without authentication is not recommended per MCP security best practices. This issue does not affect servers using stdio transport.

Servers created via createMcpExpressApp() now have this protection enabled by default when binding to localhost. Users with custom Express configurations are advised to update to version 1.24.0 and apply the exported hostHeaderValidation() middleware when running an unauthenticated server on localhost.

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Release Notes

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

v1.24.0

Compare Source

Summary

This release brings us up to speed with the latest MCP spec 2025-11-25. Take a look at the latest spec as well as the release blog post.

What's Changed

• fix: update spec links from latest to draft by @​domdomegg in #​1171
• Make sure to consume HTTP error response bodies by @​GreenStage in #​1173
• docs: add GET request handling for streamableHttp stateless mode by @​saharis9988 in #​1161
• SEP-1686: Tasks by @​LucaButBoring in #​1041
• Fix JSON parse error on SSE events with empty data by @​felixweinberger in #​1184
• Fix StreamableHTTPClientTransport instantiation by @​yuwzho in #​944
• feat: eslint rule to prefer node protocols by @​mattzcarey in #​1187
• fix: call tasks/result to deliver side-channel messages by @​felixweinberger in #​1185
• Add invalid_target oauth error (rfc 8707) by @​GreenStage in #​1183
• fix(client): use StreamableHTTPError instead of plain Error in send() by @​yamadashy in #​1178
• coerce 'expires_in' to be a number by @​adam-kuhn in #​1111
• Allow HTTP issuer URLs when MCP_DEV_MODE is enabled by @​jerome3o-anthropic in #​1189
• fix: update registerTool signature for proper typed ToolCallback by @​mattzcarey in #​1188
• SEP-1046: Client credentials flow for M2M without user interaction by @​KKonstantinov in #​1157
• adds the transitive @​types/express-serve-static-core dependency as a direct devDependency by @​mgyarmathy in #​1078
• Fix optional argument handling in prompts for Zod V4 by @​filip-bartuska-ipf in #​1199
• fix hanging stdio servers by @​mattzcarey in #​1200
• README refactor by @​KKonstantinov in #​1197
• [Docs] Fix typo by @​koic in #​1067
• feat: add closeSSEStream callback to RequestHandlerExtra by @​felixweinberger in #​1166
• fix: improve SSE reconnection behavior by @​felixweinberger in #​1191
• fix: normalize headers in sse transport by @​marcrasi in #​856
• feat: add closeStandaloneSSEStream for GET stream polling by @​felixweinberger in #​1203
• fix: normalize null to undefined in ElicitResultSchema content field by @​mattzcarey in #​1204
• Modify Origin header validation in validateRequestHeaders (streamableHttp.ts and sse.ts) to allow requests without an Origin, as they are not relevant to server DNS rebinding protection. by @​jacopoc in #​1205
• fix: allow zod 4 transformations by @​mattzcarey in #​1213
• feat: backwards-compatible createMessage overloads for SEP-1577 by @​felixweinberger in #​1212
• chore: bump version for release by @​felixweinberger in #​1215

New Contributors

• @​GreenStage made their first contribution in #​1173
• @​saharis9988 made their first contribution in #​1161
• @​yuwzho made their first contribution in #​944
• @​yamadashy made their first contribution in #​1178
• @​adam-kuhn made their first contribution in #​1111
• @​mgyarmathy made their first contribution in #​1078
• @​filip-bartuska-ipf made their first contribution in #​1199
• @​koic made their first contribution in #​1067
• @​marcrasi made their first contribution in #​856
• @​jacopoc made their first contribution in #​1205

Full Changelog: modelcontextprotocol/typescript-sdk@1.23.0...1.24.0

v1.23.1

Compare Source

Fixed:

• Disabled SSE priming events to fix backwards compatibility - 1.23.x clients crash on empty SSE data (JSON.parse(""))

This is a patch for servers still on 1.23.x that were breaking clients not handling the the 2025-11-25 priming event behavior with empty SSE data fields. See #​1233 for more details.

Full Changelog: modelcontextprotocol/typescript-sdk@1.23.0...1.23.1

v1.23.0

Compare Source

What's Changed

• Migrate to vitest from jest by @​mattzcarey in #​1074
• ci: add workflow_dispatch trigger for manual CI runs by @​felixweinberger in #​1114
• Fix: @​types/node incompatibility with vite warnings on npm install by @​KKonstantinov in #​1121
• Fix: clean up accidental spec.types.ts by @​KKonstantinov in #​1122
• fix: Pass RequestInit options to auth requests by @​dsp-ant in #​1066
• SEP-1036: URL Elicitation by @​nbarbettini in #​1105
• add none to test and the router. by @​m-henderson in #​1116
• [auth] Adjust scope management to line up with SEP-835 by @​pcarleton in #​1133
• chore: add .idea/ to .gitignore by @​maxisbey in #​1134
• chore: remove unused @​types/eslint__js dependency by @​mattzcarey in #​1128
• feat: url based client metadata registration (SEP 991) by @​mattzcarey in #​1127
• feat: zod v4 with backwards compatibility for v3.25+ by @​dclark27 in #​1040
• fix: remove pnpm lock and regenerate package-lock by @​mattzcarey in #​1138
• docs: update installation instructions for zod peer dependency by @​mattzcarey in #​1139
• Implement SEP-1577 - Sampling With Tools by @​ochafik in #​1101
• Follow up: unify v3 and v4 zod types via describe matrix and a test helper by @​KKonstantinov in #​1141
• chore: Add deprecated marker to old elicitInput overload by @​nbarbettini in #​1142
• fix: Connect error in URL elicitation example by @​nbarbettini in #​1136
• Support upscoping on insufficient_scope 403 by @​Nayana-Parameswarappa in #​1115
• Support beta releases by publishing with --tag beta by @​felixweinberger in #​1146
• Bump version to 1.23.0-beta.0 by @​felixweinberger in #​1147
• SEP-1613: use.catchall() on inputSchema/outputSchema to support JSON Schema 2020-12 by @​felixweinberger in #​1135
• sampling: validate tools, tool_use, tool_result constraints by @​ochafik in #​1156
• fix: React to upstream RC schema changes for form mode elicitation requests by @​felixweinberger in #​1164
• feat: implement SEP-1699 SSE polling via server-side disconnect by @​felixweinberger in #​1129
• chore: bump package number for release by @​felixweinberger in #​1170

New Contributors

• @​nbarbettini made their first contribution in #​1105
• @​m-henderson made their first contribution in #​1116
• @​maxisbey made their first contribution in #​1134
• @​dclark27 made their first contribution in #​1040
• @​Nayana-Parameswarappa made their first contribution in #​1115

Full Changelog: modelcontextprotocol/typescript-sdk@1.22.0...1.23.0

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