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TI-2026-18289 Aliases CVE-2026-22771GHSA-xrwg-mqj6-6m22

Envoy Extension Policy lua scripts injection causes arbitrary command execution

Priority MEDIUM 47CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-94.

Summary

Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.5.7 and 1.6.2, EnvoyExtensionPolicy Lua scripts executed by Envoy proxy can be used to leak the proxy's credentials. These credentials can then be used to communicate with the control plane and gain access to all secrets that are used by Envoy proxy, e.g. TLS private keys and credentials used for downstream and upstream communication. This vulnerability is fixed in 1.5.7 and 1.6.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00622 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed gateway (envoyproxy): 1.5.7, 1.6.2github.com/envoyproxy/gateway (Go): 1.6.2, 1.5.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
envoyproxygatewaybefore 1.5.7; 1.6.0-rc.0 to before 1.6.21.5.7, 1.6.2Patch availableCNA
—github.com/envoyproxy/gateway (Go)1.6.0-rc.0 to before 1.6.21.6.2Patch availableGHSA-xrwg-mqj6-6m22
—github.com/envoyproxy/gateway (Go)before 1.5.71.5.7Patch availableGHSA-xrwg-mqj6-6m22
  • gateway Vendorenvoyproxy Affected before 1.5.7; 1.6.0-rc.0 to before 1.6.2 Fixed in 1.5.7, 1.6.2 Patch available CNA
  • github.com/envoyproxy/gateway (Go) Vendor— Affected 1.6.0-rc.0 to before 1.6.2 Fixed in 1.6.2 Patch available GHSA-xrwg-mqj6-6m22
  • github.com/envoyproxy/gateway (Go) Vendor— Affected before 1.5.7 Fixed in 1.5.7 Patch available GHSA-xrwg-mqj6-6m22

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:envoyproxy:gateway:*:*:*:*:*:*:*:*before 1.5.7; 1.6.0 to before 1.6.2Vulnerableenvoyproxy
  • cpe:2.3:a:envoyproxy:gateway:*:*:*:*:*:*:*:* Versions before 1.5.7; 1.6.0 to before 1.6.2 Vulnerable ·envoyproxy

Remediation

  • Fix · CNA gateway (envoyproxy) Fixed in 1.5.7, 1.6.2
  • Fix · GHSA-xrwg-mqj6-6m22 github.com/envoyproxy/gateway (Go) Fixed in 1.6.2 Advisory →
  • Fix · GHSA-xrwg-mqj6-6m22 github.com/envoyproxy/gateway (Go) Fixed in 1.5.7 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat Connectivity Link 1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-22771
  2. 2026-10-03 Alias added: GHSA-xrwg-mqj6-6m22
  3. 2026-11-07 EPSS moved to the 50th–90th percentile

References

Exploit 1

Advisory 1

Other 1

  • TI-2025-17797 Envoy Admin Interface Exposed through prometheus metrics endpoint CVSS 3.1HIGH 7.1
  • TI-2025-18948 Envoy Gateway Log Injection Vulnerability CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences