CVE-2026-22771 | Envoy Extension Policy lua scripts injection causes arbitrary command execution

Exp

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.

Published: 2026-01-12 Last update: 2026-02-05 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-22771 is rated Exploit Available (50.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.00%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2026-22771

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2026-22771

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-06 0.15% 0.00% -0.15%
2 2026-01-18 0.39% 0.15% -0.23%
3 2026-01-13 — 0.39% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-22771

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2026-22771

GitHub Security Advisory for CVE-2026-22771

GHSA-xrwg-mqj6-6m22 · Severity: high · Ecosystem: go — Envoy Extension Policy lua scripts injection causes arbitrary command execution

OS Trackers for CVE-2026-22771

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2026-22771

Affected software / configurations for CVE-2026-22771

Vendor Product Version Raw CPE
envoyproxy gateway < 1.5.7 cpe:2.3:a:envoyproxy:gateway:*:*:*:*:*:*:*:*
envoyproxy gateway >= 1.6.0, < 1.6.2 cpe:2.3:a:envoyproxy:gateway:*:*:*:*:*:*:*:*

References for CVE-2026-22771

cvelogic Threat Intelligence