CVE-2026-63119
1 advisory.
RubyGems/mcp CVE-2026-63119: medium 6.2, EPSS 0.18%
MCP Ruby SDK: Unbounded line buffer in stdio transports leads to memory exhaustion (DoS)
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-7683-3w9x-ch42
- https://github.com/modelcontextprotocol/ruby-sdk/security/advisories/GHSA-7683-3w9x-ch42
- https://nvd.nist.gov/vuln/detail/CVE-2026-63119
- https://github.com/modelcontextprotocol/ruby-sdk/commit/267b8fa6285453525c81ce43db6b7dcd7a8a8c2f
- https://github.com/modelcontextprotocol/ruby-sdk
- https://github.com/modelcontextprotocol/ruby-sdk/releases/tag/v0.23.0
CVE-2026-63119 · published · modified · JSON