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Release 0.23.0 #442

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Merged
koic merged 1 commit into from
Jul 7, 2026
+19 −1
Merged

Release 0.23.0 #442

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18 changes: 18 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -7,10 +7,28 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0

## [Unreleased]

## [0.23.0] - 2026-07-07

### Added

- Add a session-ownership hook to `StreamableHTTPTransport`

### Changed

- Require calling `MCP::Client#connect` before sending requests on stdio transport (#427)

### Deprecated

- Annotate Roots, Sampling, and Logging APIs as deprecated per SEP-2577 (#429)

### Fixed

- Fix an incorrect `result: null` response to an id-bearing notification message (#435)
- Validate `Host` and `Origin` headers to prevent DNS rebinding per MCP 2025-11-25
- Bound stateful session retention to prevent an initialize-flood DoS
- Bound stdio frame reads with `max_line_bytes`
- Bound request body and frame reads to prevent memory-exhaustion DoS

## [0.22.0] - 2026-06-27

### Added
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2 changes: 1 addition & 1 deletion lib/mcp/version.rb
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@@ -1,5 +1,5 @@
# frozen_string_literal: true

module MCP
VERSION = "0.22.0"
VERSION = "0.23.0"
end