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Advisory record · GHSA-2v4p-qf9q-27wj

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

CVSS 8.7 HighEPSS 0.0064 · 50th percentile

Published by the GitHub Advisory Database at 15 Sept 2026, 18:39 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
google.golang.org/grpcGo<1.82.2 || >=1.83.0, <1.83.2 || >=1.84.0-dev, <1.84.0-dev.0.20260825144003-d5a41119e0e3 || >=1.85.0-dev, <1.85.0-dev.0.20260825072537-93e31b48545e1.82.2, 1.83.2, 1.84.0-dev.0.20260825144003-d5a41119e0e3, 1.85.0-dev.0.20260825072537-93e31b48545e
Identifiers
GHSA-2v4p-qf9q-27wj · CVE-2026-84445 · GO-2026-6443
Weakness (CWE)
CWE-129 · CWE-248
Tags
Published
15 Sept 2026
Updated
7 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The google.golang.org/grpc package is affected in versions before 1.82.2, from 1.83.0 before 1.83.2, and in certain 1.84 and 1.85 development builds. A remote client can send a request without either the :authority or Host header to a server that uses xDS routing, which causes an unhandled panic that terminates the server. Upgrade to 1.82.2, 1.83.2, or the fixed development builds listed for the affected branch.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0064, the 50th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:12 UTC First seen by agentprime
  2. 31 Oct 2026, 14:12 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.