Medium severity · published Oct 13, 2026
CVE-2026-78633
Denial of Service in Okta RADIUS Agent Packet Parser
6.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OR
Okta RADIUS Agent · Okta
2.17.5 before 2.28.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78633
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78633
trust.okta.com
https://trust.okta.com/security-advisories/denial-of-service-in-okta-radius-agent-packet-parser-cve-2026-78633
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