CVE-2026-10832 Denial of service in Cryostat 4
Remote attackers can cause JVM memory exhaustion and denial of service by sending crafted DER payloads to services using the wildfly-elytron-asn1 library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-10832?
CVE-2026-10832 is a medium-severity denial of service vulnerability in Red Hat Cryostat 4, published on 18 Sep 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 the DERDecoder class within wildfly-elytron-asn1. A remote attacker can exploit this resource exhaustion vulnerability by sending a specially crafted DER (Distinguished Encoding Rules) payload. The decoder attempts to allocate excessive memory based on an inflated length value without proper validation, leading to Java Virtual Machine (JVM) memory exhaustion. This results in a remote Denial of Service (DoS) for services that process untrusted DER/ASN.1 input, including SASL (Simple Authentication and Security Layer) authentication mechanisms and X.500 certificate principal parsing paths.
Weakness: CWE-770
Which versions are affected by CVE-2026-10832?
How do I fix CVE-2026-10832?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-10832 being exploited?
There is no known exploitation of CVE-2026-10832 in the wild and no public exploit code.
Sources
Also known as GHSA-mg33-j52w-c777.