CVE-2026-15562 Jboss-remoting: jboss-remoting: integer overflow in messagereader leads to pre-authentication denial of service
Remote unauthenticated attackers can cause server-wide denial of service via integer overflow in JBoss Remoting message reader.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-15562?
CVE-2026-15562 is a high-severity 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
A flaw was found in EAP's jboss-remoting. A remote unauthenticated attacker who can reach :8080 (or :9990, or :4447) and complete an Upgrade: jboss-remoting handshake can cause OOM errors that degrade requests server-wide, leading to denial of service.
Weakness: CWE-190
Which versions are affected by CVE-2026-15562?
How do I fix CVE-2026-15562?
Apply the vendor's patch.
Is CVE-2026-15562 being exploited?
There is no known exploitation of CVE-2026-15562 in the wild and no public exploit code.
Sources
Also known as GHSA-r89v-33gc-39f6.