CVE-2026-33439

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> tags (e.g., the Password Reset pages). This vulnerability is fixed in 16.0.6.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-2cqq-rpvq-g5qj	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openidentityplatform:openam:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-07 21:17

Updated : 2026-07-24 23:10

NVD link : CVE-2026-33439

Mitre link : CVE-2026-33439

CVE.ORG link : CVE-2026-33439

JSON object : View

Products Affected

openidentityplatform

openam

CWE

CWE-502

Deserialization of Untrusted Data

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