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0.21.2-hotfix-3

krillinai/OpenCreator0.21.2-hotfix-3Apr 14, 2026by cliffhall

AI Summary

A maintenance release for the MCP Inspector addressing bug fixes and dependency updates. Key improvements include fixing decimal input handling, resolving CORS issues with a proxy fetch, and enhancing security by sanitizing error responses.

Key Highlights

  • Fixed decimal typing behavior for number inputs in tools form
  • Added proxy fetch for auth to avoid CORS issues
  • Sanitized error responses to prevent stack trace exposure
  • Horizontal scrolling added for long values in JSON view

New Features

  • Proxy fetch for MCP Inspector client (for auth/CORS)
  • Horizontal scrolling for long values in JSON view

Full Release Notes

## What's Changed
* Fix decimal typing behavior for number inputs in tools form by @MumuTW in https://github.com/modelcontextprotocol/inspector/pull/1127
* fix: ensure DCR always registers both redirect URIs by @asoorm in https://github.com/modelcontextprotocol/inspector/pull/1173
* fix: add horizontal scrolling for long values in json view by @Dinesht04 in https://github.com/modelcontextprotocol/inspector/pull/1177
* Inspector client: Added proxy fetch for use by auth (to avoid CORS issues) by @BobDickinson in https://github.com/modelcontextprotocol/inspector/pull/1047
* chore(deps): bump hono from 4.12.1 to 4.12.2 in the npm_and_yarn group across 1 directory by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1117
* chore(deps): bump actions/upload-artifact from 6 to 7 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1125
* chore(deps): bump actions/attest-build-provenance from 3 to 4 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1126
* chore(deps): bump docker/setup-buildx-action from 3 to 4 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1136
* chore(deps): bump docker/login-action from 3 to 4 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1137
* chore(deps): bump docker/metadata-action from 5 to 6 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1138
* fix: validate serverInfo.websiteUrl before rendering as link by @cliffhall in https://github.com/modelcontextprotocol/inspector/pull/1186
* fix(server): sanitize error responses to prevent stack trace exposure by @cliffhall in https://github.com/modelcontextprotocol/inspector/pull/1187
* chore: bump version to 0.21.2 by @olaservo in https://github.com/modelcontextprotocol/inspector/pull/1194
* ci: switch npm publish to OIDC trusted publishing by @pcarleton in https://github.com/modelcontextprotocol/inspector/pull/1199
* Update package.json to contain repository.url in for npm trusted publisher setup by @cliffhall in https://github.com/modelcontextprotocol/inspector/pull/1201
* fix: add repository field to workspace package.json files for npm trusted publishing by @cliffhall in https://github.com/modelcontextprotocol/inspector/pull/1202

## New Contributors
* @MumuTW made their first contribution in https://github.com/modelcontextprotocol/inspector/pull/1127
* @Dinesht04 made their first contribution in https://github.com/modelcontextprotocol/inspector/pull/1177

**Full Changelog**: https://github.com/modelcontextprotocol/inspector/compare/0.21.1...0.21.2-hotfix-3