Red Hat Apache Camel 4 for Quarkus 3 SmallRye Fault Tolerance denial of service

Summaryinfo

A vulnerability classified as problematic has been found in Red Hat Apache Camel 4 for Quarkus 3, Apicurio Registry 3, Fuse 7 and Quarkus. The affected element is an unknown function of the component SmallRye Fault Tolerance. Performing a manipulation results in denial of service. This vulnerability was named CVE-2026-94449. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Red Hat Apache Camel 4 for Quarkus 3, Apicurio Registry 3, Fuse 7 and Quarkus (version now known). It has been classified as problematic. This affects some unknown processing of the component SmallRye Fault Tolerance. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

A flaw was found in the SmallRye Fault Tolerance library, which is used by Quarkus to provide strategies like retries and circuit breakers for microservices. The issue occurs when using the ApplyGuard or ApplyFaultTolerance annotations, where the library fails to release internal tracking objects after each request. This causes a steady increase in memory usage that eventually leads to the application slowing down and crashing due to lack of memory.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-94449 since 09/21/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/21/2026). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

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

Vendor

• Red Hat

Name

• Apache Camel 4 for Quarkus 3
• Apicurio Registry 3
• Fuse 7
• Quarkus

License

• open-source

Website

• Vendor: https://www.redhat.com/

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