CVE-2026-33439
Published:April 07, 2026
Updated:April 18, 2026
Open Access Management (OpenAM) is an access management solution. Prior to 16.0.6, OpenIdentityPlatform OpenAM is vulnerable to pre-authentication Remote Code Execution (RCE) via unsafe Java deserialization of the jato.clientSession HTTP parameter. This bypasses the WhitelistObjectInputStream mitigation that was applied to the jato.pageSession parameter after CVE-2021-35464. An unauthenticated attacker can achieve arbitrary command execution on the server by sending a crafted serialized Java object as the jato.clientSession GET/POST parameter to any JATO ViewBean endpoint whose JSP contains "jato:form" (jato:form) tags (e.g., the Password Reset pages). This vulnerability is fixed in 16.0.6.
Affected Packages
https://github.com/OpenIdentityPlatform/OpenAM.git (GITHUB):
Affected version(s) >=Agents-3.1.0-Xpress <16.0.6Fix Suggestion:
Update to version 16.0.6org.openidentityplatform.openam:openam-core (JAVA):
Affected version(s) >=14.5.2 <16.0.6Fix Suggestion:
Update to version 16.0.6Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Deserialization of Untrusted Data
EPSS
Base Score:
7.96
