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Advisory record · GHSA-xrwg-mqj6-6m22

Envoy Extension Policy lua scripts injection causes arbitrary command execution

CVSS 8.8 HighEPSS 0.0062 · 50th percentile

Published by the GitHub Advisory Database at 13 Jan 2026, 18:47 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/envoyproxy/gatewayGo>=1.6.0-rc.0, <1.6.2 || <1.5.71.6.2, 1.5.7
Identifiers
GHSA-xrwg-mqj6-6m22 · BIT-envoy-gateway-2026-22771 · CVE-2026-22771 · GO-2026-4312
Weakness (CWE)
CWE-94
Tags
Published
13 Jan 2026
Updated
10 Sept 2026

Machine-written summary

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

Envoy Gateway (github.com/envoyproxy/gateway) versions before 1.5.7, and 1.6.0-rc.0 through before 1.6.2, are vulnerable. A user who is allowed to create EnvoyExtensionPolicy resources can inject Lua scripts that leak the Envoy proxy's credentials and can execute arbitrary code in the Envoy Gateway controller pod, enabling privilege escalation. Upgrade to 1.5.7 or 1.6.2. As a workaround, restrict creation of EnvoyExtensionPolicy resources to trusted namespaces using Kubernetes RBAC.

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
8.8 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0062, the 50th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:13 UTC First seen by agentprime
  2. 31 Oct 2026, 14:13 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.