CVE-2026-78629 Improper Authentication Verification in the Okta Hyperdrive Agent MFA Response Handling

Medium 5.6 Published 8 Sep 2026 Updated 10 Sep 2026

Attackers can bypass MFA verification when policies allow it, receiving unverifiable authentication success responses from the Okta Hyperdrive Agent.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-78629?

CVE-2026-78629 is a medium-severity authentication bypass vulnerability in Okta Hyperdrive Agent, published on 8 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The Okta Hyperdrive agent plugin returns a success response without a signed SAML assertion when the organization's policy requires no MFA for a given user. The response contains only a bare boolean validation indicator with no cryptographic artifact, resulting in an unverifiable authentication verdict being delivered to the relying application.

Weakness: CWE-303

Which versions are affected by CVE-2026-78629?

It affects 1 product.

Products include Okta Hyperdrive.

How do I fix CVE-2026-78629?

No fix has been published for CVE-2026-78629 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-2026-78629 being exploited?

There is no known exploitation of CVE-2026-78629 in the wild and no public exploit code.

Sources

Also known as GHSA-p4wq-g97j-pcf5.