7.5

CVE-2026-47427

Exploit

GitHub MCP Server: Nil Pointer Dereference DoS in completion/complete Handler

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Github ≫ Mcp Server Version < 1.1.0
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.41% 0.338
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://github.com/github/github-mcp-server/commit/c88d2ecdd3bb07f7bdd75296e3ee676febf14f58
Patch
https://github.com/github/github-mcp-server/pull/2502
Patch
Issue Tracking
https://github.com/github/github-mcp-server/releases/tag/v1.1.0
Release Notes
https://github.com/github/github-mcp-server/security/advisories/GHSA-w4q6-qw23-4rg7
Vendor Advisory
Exploit