CVE-2026-33439: CWE-502: Deserialization of Untrusted Data in OpenIdentityPlatform OpenAM
OpenIdentityPlatform OpenAM versions prior to 16. 0. 6 contain a critical deserialization vulnerability (CWE-502) that allows unauthenticated remote code execution. The flaw arises from unsafe Java deserialization of the jato. clientSession HTTP parameter, bypassing previous mitigations applied to a similar parameter. An attacker can exploit this by sending a crafted serialized Java object to specific endpoints using JATO ViewBean JSPs, such as password reset pages. This vulnerability is fixed in version 16. 0. 6.
AI Analysis
Technical Summary
OpenAM before version 16.0.6 is vulnerable to a pre-authentication remote code execution via unsafe deserialization of the jato.clientSession HTTP parameter. This vulnerability bypasses the WhitelistObjectInputStream mitigation that was previously applied to the jato.pageSession parameter following CVE-2021-35464. Exploitation requires sending a malicious serialized Java object to any JATO ViewBean endpoint containing <jato:form> tags, enabling arbitrary command execution on the server without authentication. The issue is addressed in OpenAM 16.0.6.
Potential Impact
An unauthenticated attacker can achieve arbitrary code execution on the server hosting OpenAM by exploiting unsafe deserialization of user-supplied data. This can lead to full system compromise, data breach, or disruption of access management services. The CVSS 4.0 base score is 9.3, indicating critical severity with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
This vulnerability is fixed in OpenAM version 16.0.6. Users should upgrade to version 16.0.6 or later to remediate this issue. No official patch or temporary workaround is indicated in the provided data. Until upgraded, affected systems remain vulnerable. Patch status is not explicitly confirmed beyond the fixed version note; verify with the vendor advisory for the latest remediation guidance.
CVE-2026-33439: CWE-502: Deserialization of Untrusted Data in OpenIdentityPlatform OpenAM
Description
OpenIdentityPlatform OpenAM versions prior to 16. 0. 6 contain a critical deserialization vulnerability (CWE-502) that allows unauthenticated remote code execution. The flaw arises from unsafe Java deserialization of the jato. clientSession HTTP parameter, bypassing previous mitigations applied to a similar parameter. An attacker can exploit this by sending a crafted serialized Java object to specific endpoints using JATO ViewBean JSPs, such as password reset pages. This vulnerability is fixed in version 16. 0. 6.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OpenAM before version 16.0.6 is vulnerable to a pre-authentication remote code execution via unsafe deserialization of the jato.clientSession HTTP parameter. This vulnerability bypasses the WhitelistObjectInputStream mitigation that was previously applied to the jato.pageSession parameter following CVE-2021-35464. Exploitation requires sending a malicious serialized Java object to any JATO ViewBean endpoint containing <jato:form> tags, enabling arbitrary command execution on the server without authentication. The issue is addressed in OpenAM 16.0.6.
Potential Impact
An unauthenticated attacker can achieve arbitrary code execution on the server hosting OpenAM by exploiting unsafe deserialization of user-supplied data. This can lead to full system compromise, data breach, or disruption of access management services. The CVSS 4.0 base score is 9.3, indicating critical severity with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
This vulnerability is fixed in OpenAM version 16.0.6. Users should upgrade to version 16.0.6 or later to remediate this issue. No official patch or temporary workaround is indicated in the provided data. Until upgraded, affected systems remain vulnerable. Patch status is not explicitly confirmed beyond the fixed version note; verify with the vendor advisory for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-19T18:45:22.438Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d5743aaaed68159a661740
Added to database: 4/7/2026, 9:16:42 PM
Last enriched: 4/15/2026, 3:52:38 PM
Last updated: 5/22/2026, 11:11:35 PM
Views: 283
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