Go/github.com/modelcontextprotocol/go-sdk CVE-2026-27896: high 7.5, EPSS 0.29%
MCP Go SDK Vulnerable to Improper Handling of Case Sensitivity
Action: Upgrade github.com/modelcontextprotocol/go-sdk to 1.3.1 or later.
go get github.com/modelcontextprotocol/go-sdk@v1.3.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1.3.1 | - |
Fixed versions
| 1.3.1 |
Sources
- osv: GHSA-wvj2-96wp-fq3f
- nvd: CVE-2026-27896
- https://github.com/modelcontextprotocol/go-sdk/security/advisories/GHSA-wvj2-96wp-fq3f
- https://github.com/modelcontextprotocol/go-sdk/commit/7b8d81c264074404abdf5aa16e2cf0c2d9c64cc0
- https://github.com/modelcontextprotocol/go-sdk
CVE-2026-27896 · published · modified · JSON