GO-2026-6443

    Dashboard / Vulnerabilities / GO-2026-6443

    GO-2026-6443

    Published: 15 Sept 2026Last Modified: 7 Oct 2026

    Summary: Server panic via missing authority or Host headers in google.golang.org/grpc

    Details: In google.golang.org/grpc, servers configured with xDS routing can panic when processing requests that lack both :authority and Host headers. The HTTP/2 transport layer accepted requests missing these headers, and the xDS server routing interceptor attempted to index the empty authority slice, causing an unhandled panic and terminating the server.

    References: https://github.com/grpc/grpc-go/security/advisories/GHSA-2v4p-qf9q-27wj, https://github.com/grpc/grpc-go/issues/9354, https://github.com/grpc/grpc-go/pull/9365

    Affected packages

    Package

    Name: google.golang.org/grpc

    Purl: pkg:golang/google.golang.org/grpc

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.82.2

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High