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CVE-2025-66560 PUBLISHED CVSS 5.900000095367432 MEDIUM

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 response is being written, the framework waits for previously written response chunks to be fully transmitted before proceeding. If the client connection is dropped during this waiting period, the associated worker thread is never released and becomes permanently blocked. Under sustained or repeated occurrences, this can exhaust the available worker threads, leading to degraded performance, or complete unavailability of the application. This issue has been patched in versions 3.31.0, 3.27.2, and 3.20.5. A workaround involves implementing a health check that monitors the status and saturation of the worker thread pool to detect abnormal thread retention early.

EPSS 0.02% · 5.3th percentile

Risk Scores

CVSS v3.1
5.900000095367432
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.02%
5.3th percentile

Affected Products

VendorProductVersions
Mavenio.quarkus:quarkus-rest0, 3.30.0, 3.21.0
quarkusquarkus3.30.0, 0, 3.21.0
quarkusioquarkus>= 3.30.0, < 3.31.0, < 3.20.5, >= 3.21.0, < 3.27.2

Timeline

References

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