CVE-2026-78552 PUBLISHED

Validation Bypass in Okta Access Gateway Custom Directives

Assigner: Okta
Reserved: 24.08.2026 Published: 08.09.2026 Updated: 08.09.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L
CVSS Score: 6

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	Okta
Product	Okta Access Gateway
Versions	Default: unaffected affected from 0 to 2026.9.1 (excl.)

Solutions

Upgrade the Okta Access Gateway appliance to version 2026.9.1 or greater.

References

https://trust.okta.com/security-advisories/validation-bypass-in-okta-access-gateway-custom-directives-cve-2026-78552

Problem Types

Protection Mechanism Failure