CVE-2026-78633: Okta Radius Agent

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

The Okta RADIUS Agent does not validate the sub-attribute length when parsing a Vendor-Specific attribute. A sub-attribute length of zero causes the parser to loop indefinitely, resulting in worker-thread exhaustion and denial of new RADIUS authentication requests.

Affected products

• Okta Okta Radius Agent: from 2.17.5, before 2.28.0 (fixed in 2.28.0)

Published 2026-10-13. Last modified 2026-10-16.