Open-Source Security Intelligence

Know every vulnerability
before it knows you.

DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.

Check if your repositories are affected!View on GitHub
Search

GO-2026-6441

Published Sep 15, 2026·Last modified Sep 15, 2026
Affected Components(1)
Go logogoogle.golang.org/grpc
< 1.83.1
Description

In google.golang.org/grpc, the xDS RBAC HTTP filter does not lowercase header matcher names before evaluating them against incoming request metadata. When an RBAC policy defines rules (such as DENY) referencing headers with uppercase or mixed-case characters, the rule fails to match, causing authorization policies to fail open. Additionally, callers can evade gRFC A41 validation blocking "grpc-" prefixed headers and ":scheme" via variations in casing.

Upload your SBOM

Upload your own SBOM in CycloneDX 1.6 or higher (JSON) directly here to check your vulnerabilities.

Risk Scores
Base Score
0.0

Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.

Threat Intelligence
0.0

No exploitation activity has been observed at this time. Continue routine monitoring.

EPSS
0.31%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
Scan your project

Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.

Checkout DevGuard