Review reviewHigh

CVE-2026-22771

envoyproxy gateway, Red Hat Connectivity Link 1

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.

CVSS: 8.8
EPSS: 0.57%
CISA KEV: Not listed
Published: 2026.01.13

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.57%

Technical severityCVSS 8.8

Vulnerability overview

Affected product and versions

Product: envoyproxy gateway, Red Hat Connectivity Link 1
Affected versions: >= < 1.5.7, >= >= 1.6.0-rc.0, < 1.6.2, < 1.5.7, >= 1.6.0 < 1.6.2
Fixed versions: 1.5.7, 1.6.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that envoyproxy gateway, Red Hat Connectivity Link 1 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-94