MODERATERubyGems →
MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection
MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection
Affected packages
- mcp— before 0.23.0
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- 0.20%
- EPSS percentile
- 9.8%
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs. This advisory is in the top 10%.
Sources
- 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
Structured record: https://osv.dev/vulnerability/GHSA-rjr6-rcgv-9m7m
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