Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 31.0%
CVSS Severity
CVSS v3 Score 9.8
Products affected by CVE-2026-33439
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cpe:2.3:a:openidentityplatform:openam:-
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cpe:2.3:a:openidentityplatform:openam:10.0.0
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cpe:2.3:a:openidentityplatform:openam:10.0.1
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cpe:2.3:a:openidentityplatform:openam:12.0.0
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cpe:2.3:a:openidentityplatform:openam:12.0.0-1
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cpe:2.3:a:openidentityplatform:openam:12.0.3
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cpe:2.3:a:openidentityplatform:openam:13.0.0
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cpe:2.3:a:openidentityplatform:openam:13.0.0-137
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cpe:2.3:a:openidentityplatform:openam:13.5.0
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cpe:2.3:a:openidentityplatform:openam:14.0.0
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cpe:2.3:a:openidentityplatform:openam:14.0.1
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cpe:2.3:a:openidentityplatform:openam:14.0.2
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cpe:2.3:a:openidentityplatform:openam:14.0.3
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cpe:2.3:a:openidentityplatform:openam:14.0.4
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cpe:2.3:a:openidentityplatform:openam:14.0.5
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cpe:2.3:a:openidentityplatform:openam:14.0.6
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cpe:2.3:a:openidentityplatform:openam:14.1.1
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cpe:2.3:a:openidentityplatform:openam:14.1.10
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cpe:2.3:a:openidentityplatform:openam:14.1.11
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cpe:2.3:a:openidentityplatform:openam:14.1.12
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cpe:2.3:a:openidentityplatform:openam:14.1.13
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cpe:2.3:a:openidentityplatform:openam:14.1.16
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cpe:2.3:a:openidentityplatform:openam:14.1.17
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cpe:2.3:a:openidentityplatform:openam:14.1.2
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cpe:2.3:a:openidentityplatform:openam:14.1.3
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cpe:2.3:a:openidentityplatform:openam:14.1.4
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cpe:2.3:a:openidentityplatform:openam:14.1.5
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cpe:2.3:a:openidentityplatform:openam:14.1.6
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cpe:2.3:a:openidentityplatform:openam:14.1.7
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cpe:2.3:a:openidentityplatform:openam:14.1.8
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cpe:2.3:a:openidentityplatform:openam:14.1.9
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cpe:2.3:a:openidentityplatform:openam:14.2.1
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cpe:2.3:a:openidentityplatform:openam:14.2.2
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cpe:2.3:a:openidentityplatform:openam:14.3.1
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cpe:2.3:a:openidentityplatform:openam:14.4.1
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cpe:2.3:a:openidentityplatform:openam:14.4.2
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cpe:2.3:a:openidentityplatform:openam:14.5.1
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cpe:2.3:a:openidentityplatform:openam:14.5.2
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cpe:2.3:a:openidentityplatform:openam:14.5.3
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cpe:2.3:a:openidentityplatform:openam:14.5.4
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cpe:2.3:a:openidentityplatform:openam:14.6.1
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cpe:2.3:a:openidentityplatform:openam:14.6.2
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cpe:2.3:a:openidentityplatform:openam:14.6.3
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cpe:2.3:a:openidentityplatform:openam:14.6.4
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cpe:2.3:a:openidentityplatform:openam:14.6.5
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cpe:2.3:a:openidentityplatform:openam:14.6.6
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cpe:2.3:a:openidentityplatform:openam:14.7.2
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cpe:2.3:a:openidentityplatform:openam:14.7.3
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cpe:2.3:a:openidentityplatform:openam:14.7.4
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cpe:2.3:a:openidentityplatform:openam:14.8.1
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cpe:2.3:a:openidentityplatform:openam:14.8.2
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cpe:2.3:a:openidentityplatform:openam:14.8.3
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cpe:2.3:a:openidentityplatform:openam:14.8.4
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cpe:2.3:a:openidentityplatform:openam:15.0.0
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cpe:2.3:a:openidentityplatform:openam:15.0.1
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cpe:2.3:a:openidentityplatform:openam:15.0.2
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cpe:2.3:a:openidentityplatform:openam:15.0.3
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cpe:2.3:a:openidentityplatform:openam:15.0.4
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cpe:2.3:a:openidentityplatform:openam:15.1.0
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cpe:2.3:a:openidentityplatform:openam:15.1.1
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cpe:2.3:a:openidentityplatform:openam:15.1.2
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cpe:2.3:a:openidentityplatform:openam:15.1.3
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cpe:2.3:a:openidentityplatform:openam:15.1.4
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cpe:2.3:a:openidentityplatform:openam:15.1.5
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cpe:2.3:a:openidentityplatform:openam:15.1.6
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cpe:2.3:a:openidentityplatform:openam:15.2.0
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cpe:2.3:a:openidentityplatform:openam:15.2.1
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cpe:2.3:a:openidentityplatform:openam:15.2.2
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cpe:2.3:a:openidentityplatform:openam:16.0.0
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cpe:2.3:a:openidentityplatform:openam:16.0.3
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cpe:2.3:a:openidentityplatform:openam:16.0.4
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cpe:2.3:a:openidentityplatform:openam:16.0.5
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cpe:2.3:a:openidentityplatform:openam:9.5
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cpe:2.3:a:openidentityplatform:openam:9.5.1
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cpe:2.3:a:openidentityplatform:openam:9.5.2
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cpe:2.3:a:openidentityplatform:openam:9.5.3
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cpe:2.3:a:openidentityplatform:openam:9.5.4
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cpe:2.3:a:openidentityplatform:openam:9.5.5