CVE-2026-15560 Openjdk-orb: unauthed class loading via iiop in eap
Unauthenticated attackers can execute arbitrary code in JBoss EAP by supplying malicious CDR codebase URLs during IIOP object unmarshalling when security manager is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-15560?
CVE-2026-15560 is a high-severity unsafe deserialization vulnerability in Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
when EAP runs with -secmgr, the openjdk-orb's JDKBridge honours attacker-supplied CDR codebase URLs during object unmarshalling on :3528, allowing an unauthenticated attacker to load and instantiate arbitrary classes from a remote URL in the server JVM before EJB security interceptors run.
Weakness: CWE-829
Which versions are affected by CVE-2026-15560?
How do I fix CVE-2026-15560?
Apply the vendor's patch.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-15560 being exploited?
There is no known exploitation of CVE-2026-15560 in the wild and no public exploit code.
Sources
Also known as GHSA-4238-grjh-g4xm.