CVE-2026-63118
1 advisory.
RubyGems/mcp CVE-2026-63118: medium, EPSS 0.26%
MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection
Action: Upgrade mcp to 0.23.0 or later.
bundle update mcpAffected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 0.23.0 | - |
Fixed versions
| 0.23.0 |
Sources
- osv: GHSA-rjr6-rcgv-9m7m
- https://github.com/modelcontextprotocol/ruby-sdk/security/advisories/GHSA-rjr6-rcgv-9m7m
- https://nvd.nist.gov/vuln/detail/CVE-2026-63118
- https://github.com/modelcontextprotocol/ruby-sdk/commit/ba543083a7594e7892b29464b89091816446ff7a
- https://github.com/modelcontextprotocol/ruby-sdk
- https://github.com/modelcontextprotocol/ruby-sdk/releases/tag/v0.23.0
CVE-2026-63118 · published · modified · JSON