---
id: CVE-2026-78552
title: >-
  The Okta Access Gateway does not apply its Lua directive restriction to the
  application-level custom configuration field
summary: >-
  The Okta Access Gateway does not apply its Lua directive restriction to the
  application-level custom configuration field. The field is interpolated
  directly into the nginx server block without inspection, resulting in
  execution of inject…
severity: medium
cvss: 6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L'
cwe:
  - CWE-693
vendor: Okta
product: Okta Access Gateway
affected:
  - access_gateway < 2026.9.1
published: '2026-09-08'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T18:18:08.237'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78552'
references:
  - url: >-
      https://trust.okta.com/security-advisories/validation-bypass-in-okta-access-gateway-custom-directives-cve-2026-78552
    label: psirt@okta.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T17:49:35.554063Z'
epss: 0.00329
epssPercentile: 0.26295
ingestedAt: '2026-09-08T21:11:12.319Z'
---

## Overview

The Okta Access Gateway does not apply its Lua directive restriction to the application-level custom configuration field. The field is interpolated directly into the nginx server block without inspection, resulting in execution of injected directives.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.