CVE-2026-47427

Published: Lug 28, 2026 Last Modified: Lug 28, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0039
Percentile
0,3th
Updated

Single Data Point

Only one EPSS measurement is available for this CVE. Trend analysis requires multiple data points over time.

476

NULL Pointer Dereference

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality
Potential Impacts:
Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands Read Memory Modify Memory
Applicable Platforms
Languages: C, C++, Java, C#, Go
Likelihood of Exploit: Medium
View CWE Details
https://github.com/github/github-mcp-server/security/adviso…
https://github.com/github/github-mcp-server/security/advisories/GHSA-w4q6-qw23-…
https://github.com/github/github-mcp-server/commit/c88d2ecd…
https://github.com/github/github-mcp-server/commit/c88d2ecdd3bb07f7bdd75296e3ee…
https://github.com/github/github-mcp-server/pull/2502
https://github.com/github/github-mcp-server/pull/2502
https://github.com/github/github-mcp-server/releases/tag/v1…
https://github.com/github/github-mcp-server/releases/tag/v1.1.0
https://github.com/github/github-mcp-server/security/adviso…
https://github.com/github/github-mcp-server/security/advisories/GHSA-w4q6-qw23-…