---
title: "CVE-2026-94449: SmallRye Fault Tolerance - Denial of Service"
description: "SmallRye Fault Tolerance library used by Quarkus contains a memory leak caused by failure to release internal tracking objects after each request when using ApplyGuard or ApplyFaultTolerance annotations, letting attackers cause denial of service by exhausting memory, exploit requires usage of these annotations."
url: https://panop.io/threat-heartbeat/CVE-2026-94449/
---

# CVE-2026-94449 SmallRye Fault Tolerance - Denial of Service

SmallRye Fault Tolerance library used by Quarkus contains a memory leak caused by failure to release internal tracking objects after each request when using ApplyGuard or ApplyFaultTolerance annotations, letting attackers cause denial of service by exhausting memory, exploit requires usage of these annotations.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.49% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-94449)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

21 September 2026

Updated

15 October 2026

Weakness

[CWE-400](https://cwe.mitre.org/data/definitions/400.html)

## Vendor fix

Update to the latest version of SmallRye Fault Tolerance library with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-94449](https://nvd.nist.gov/vuln/detail/CVE-2026-94449)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2537502](https://bugzilla.redhat.com/show_bug.cgi?id=2537502)
- [https://access.redhat.com/security/cve/CVE-2026-94449](https://access.redhat.com/security/cve/CVE-2026-94449)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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