# CVE-2026-94449: Quarkus-smallrye-fault-tolerance: quarkus-smallrye-fault-tolerance: memory leak in @applyguard leads to denial of service

Status: published. Published: 2026-09-21. Updated: 2026-11-06.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Red Hat / Red Hat Build of Apache Camel 3.33.4.redhat (io.quarkus/quarkus-smallrye-fault-tolerance): ≥ 3.33.4.redhat-00004; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Quarkus 3.27.6.redhat (io.quarkus/quarkus-smallrye-fault-tolerance): ≥ 3.27.6.redhat-00004; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Quarkus 3.33.4.redhat (io.quarkus/quarkus-smallrye-fault-tolerance): ≥ 3.33.4.redhat-00004; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Exploit Intelligence (exploit-intelligence/agent-client-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Apache Camel 4 for Quarkus 3 (quarkus-smallrye-fault-tolerance): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Apicurio Registry 3 (quarkus-smallrye-fault-tolerance): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Fuse 7 (quarkus-smallrye-fault-tolerance): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.63% as of 2026-11-05; percentile 50.33%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-400

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2026:83082 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:83520 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:83670 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2026-94449 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2537502 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-94449; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-94449; retrieved 2026-11-06; source updated Not reported

Revision: a36c9de9058a31cd68da2c7f6858e8a3a3f8656dbb15fb2ec8c1463b9acd6515

Canonical: https://y2.dev/cve/CVE-2026-94449

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.