CVE-2026-45794 OpenAM Unsafe Java Deserialization via SNS
A low-privileged user can trigger unsafe Java deserialization in OpenAM's SNS callback, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45794?
CVE-2026-45794 is a high-severity unsafe deserialization vulnerability in OpenIdentityPlatform OpenAM, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, the anonymous Push Notification SNS callback handled by SnsMessageResource falls back to a CTS predicate blob after a messageId expires from the in-memory dispatcher, treats top-level blob keys as Java class names for Class.forName, and deserializes attacker-controlled JSON through Jackson. A low-privileged user who starts Push Registration and obtains the messageId, shared secret, and challenge can wait for expiry, replace the persistent blob through anonymous callbacks, and trigger class loading and construction in the OpenAM JVM. The primitive can cause classpath-dependent process execution, file writes, or denial of service, although command execution was not confirmed on the tested stock classpath. This issue is fixed in version 16.1.1.
Weakness: CWE-502
Which versions are affected by CVE-2026-45794?
2 open source packages ship an affected version, including org.openidentityplatform.openam:openam-push-notification.
| Package | Affected | Fixed in |
|---|---|---|
org.openidentityplatform.openam:openam-push-notification Maven | All versions | 16.1.1 |
org.openidentityplatform.openam:openam-push-notification Maven | All versions | 16.1.1 |
How do I fix CVE-2026-45794?
Upgrade org.openidentityplatform.openam:openam-push-notification to 16.1.1 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-45794 being exploited?
There is no known exploitation of CVE-2026-45794 in the wild and no public exploit code.
Sources
Also known as GHSA-pp89-732f-3g8q, UBUNTU-CVE-2026-45794.