Red Hat WildFly wildfly-elytron-asn1 DERDecoder resource consumption

Summaryinfo

A vulnerability described as problematic has been identified in Red Hat WildFly. This issue affects the function DERDecoder of the component wildfly-elytron-asn1. Such manipulation leads to resource consumption. This vulnerability is referenced as CVE-2026-10832. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Red Hat WildFly (unknown version). It has been rated as problematic. Affected by this issue is the function DERDecoder of the component wildfly-elytron-asn1. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

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.

The advisory is available at access.redhat.com. This vulnerability is handled as CVE-2026-10832 since 06/04/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/18/2026). This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Application Server Software

Vendor

• Red Hat

Name

• WildFly

License

• open-source

Website

• Vendor: https://www.redhat.com/

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