All vulnerabilities
CVE-2026-78633

Denial of Service in Okta RADIUS Agent Packet Parser

Okta Okta RADIUS AgentIdentity & access
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.21%Chance of exploitation activity in the next 30 days, higher than 10% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.28.0Fixed versionCVE List
Published13 Oct 2026Updated 16 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 1

  • Okta RADIUS Agentaffected: 2.17.5 before 2.28.0CVE List

References 1