What is CVE-2025-66560?

CVE-2025-66560 is a medium-severity vulnerability in Quarkus, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.9/10. Published 2026-01-07.

How severe is CVE-2025-66560?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Resource exhaustion in Quarkus

CVE-2025-66560

Quarkus is a Cloud Native, (Linux) Container First framework for writing Java applications. Prior to versions 3.31.0, 3.27.2, and 3.20.5, a vulnerability exists in the HTTP layer of Quarkus REST related to response handling. When a respons…

EPSS: 0.003 (27.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Quarkus
Quarkusio Quarkus — versions >= 3.30.0, < 3.31.0, >= 3.21.0, < 3.27.2, < 3.20.5

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2025-66560?: CVE-2025-66560 is a medium-severity vulnerability in Quarkus, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.9/10. Published 2026-01-07.
How severe is CVE-2025-66560?: Medium severity. CVSS v3 base score is 5.9 out of 10.