CVE-2026-47427: falha de alta gravidade em github-mcp-server
GitHub MCP Server: Nil Pointer Dereference DoS in completion/complete Handler
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21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.5epss 0.8%
GitHub MCP Server is GitHub's official MCP Server. Prior to 1.1.0, the CompletionsHandler function in pkg/github/server.go accesses params.Ref without first checking whether it is nil, so a completion/complete request with a missing or empty ref field triggers a nil pointer dereference and a Go runtime panic; because the crash occurs before any authentication or token validation, any unauthenticated client able to send JSON-RPC messages can crash the server, resulting in a complete denial of service. This issue is fixed in version 1.1.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Produtos afetados
github · github-mcp-serverCVEs relacionadas — github-mcp-server
No mesmo produto, das mais perigosas para as menos.
Referências
https://github.com/github/github-mcp-server/commit/c88d2ecdd3bb07f7bdd75296e3ee676febf14f58https://github.com/github/github-mcp-server/pull/2502https://github.com/github/github-mcp-server/releases/tag/v1.1.0https://github.com/github/github-mcp-server/security/advisories/GHSA-w4q6-qw23-4rg7