CVE-2026-50141: Grpc Metadata Auth Spoofing

Reading authenticated identifiers (like user or agent IDs) directly from gRPC incoming metadata can lead to authentication bypass or spoofing. When an upstream interceptor appends a verified identity to the metadata, client-supplied values can precede the server-appended values in the metadata slice. Handlers extracting the first value (`values[0]`) will pro

Provally CuratedPublic repositoryHighMedium confidenceVerifiedApache-2.0Go
greprules fetch cve-2026-50141-grpc-metadata-auth-spoofing --engine opengrep

Description

Reading authenticated identifiers (like user or agent IDs) directly from gRPC incoming metadata can lead to authentication bypass or spoofing. When an upstream interceptor appends a verified identity to the metadata, client-supplied values can precede the server-appended values in the metadata slice. Handlers extracting the first value (`values[0]`) will pro