What is CVE-2026-33439?

CVE-2026-33439 is a vulnerability in Openidentityplatform Openam, classified under Deserialization of Untrusted Data. Published 2026-04-07.

Is CVE-2026-33439 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Openidentityplatform Openam

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 p…

Vulnerability class: Insecure Deserialization

EPSS: 0.171 (95.1th percentile) — read the EPSS interpretation.

Affected products

Openidentityplatform Openam — versions < 16.0.6

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-2cqq-rpvq-g5qj (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-33439?: CVE-2026-33439 is a vulnerability in Openidentityplatform Openam, classified under Deserialization of Untrusted Data. Published 2026-04-07.
Is CVE-2026-33439 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.