Okta RADIUS Agent up to 2.27.x Packet Parser infinite loop

Summaryinfo

A vulnerability categorized as critical has been discovered in Okta RADIUS Agent up to 2.27.x. Impacted is an unknown function of the component Packet Parser. The manipulation results in infinite loop. This vulnerability is identified as CVE-2026-78633. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Okta RADIUS Agent up to 2.27.x. Affected is an unknown functionality of the component Packet Parser. The manipulation with an unknown input leads to a infinite loop vulnerability. CWE is classifying the issue as CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is available at trust.okta.com. This vulnerability is traded as CVE-2026-78633 since 08/25/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 2.28.0 eliminates this vulnerability.

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Productinfo

Vendor

• Okta

Name

• RADIUS Agent

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27

CPE 2.3info

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CPE 2.2info

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