Memory Leak Vulnerability in SmallRye Fault Tolerance Library Used by Quarkus
CVE-2026-94449

7.5HIGH

Key Information:

Vendor

Red Hat
Status
Exploit Intelligence
Red Hat Build Of Apache Camel 4 For Quarkus 3
Red Hat Build Of Apicurio Registry 3
Red Hat Build Of Quarkus
Vendor
CVE Published:
21 September 2026

What is CVE-2026-94449?

A memory leak has been identified in the SmallRye Fault Tolerance library, which is utilized by Quarkus to implement fault-tolerant strategies such as retries and circuit breakers for microservices. The flaw arises specifically when the ApplyGuard or ApplyFaultTolerance annotations are employed. In these scenarios, the library does not adequately release internal tracking objects after each request, leading to a gradual increase in memory usage. If left unaddressed, this issue can result in significant application slowdown and potential crashes due to memory exhaustion.

References

https://access.redhat.com/security/cve/CVE-2026-94449
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2537502
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by Jan (Red Hat).
.