CVE-2026-78560 Improper Authentication Validation in Okta Access Gateway Pass-Through Authentication Source

Medium 4.8 Published 8 Sep 2026 Updated 10 Sep 2026

Attackers can bypass authentication by spoofing headers if the optional pass-through source is enabled without upstream header sanitization.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-78560?

CVE-2026-78560 is a medium-severity authentication bypass vulnerability in Okta Access Gateway, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The Okta Access Gateway includes an optional pass-through authentication source that accepts user identity from a client-supplied HTTP header without cryptographic validation. In architectures where this optional source is enabled without an upstream reverse proxy or firewall configured to sanitize and enforce client headers, an unauthenticated user can supply an arbitrary identity value to initiate a session.

Weakness: CWE-287

Which versions are affected by CVE-2026-78560?

It affects 1 product.

Products include Okta Access Gateway.

How do I fix CVE-2026-78560?

No fix has been published for CVE-2026-78560 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-78560 being exploited?

There is no known exploitation of CVE-2026-78560 in the wild and no public exploit code.

Sources

Also known as GHSA-fv22-crrj-w4gc.