Vulnerability Description
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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openidentityplatform | Openam | < 16.0.6 |
Related Weaknesses (CWE)
References
- https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-2cqq-rpvExploitVendor Advisory
FAQ
What is CVE-2026-33439?
CVE-2026-33439 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 deseriali...
How severe is CVE-2026-33439?
CVE-2026-33439 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-33439?
Check the references section above for vendor advisories and patch information. Affected products include: Openidentityplatform Openam.