CVE-2017-20189: Clojure

Critical severity, CVSS 9.8. EPSS: 1.3% chance of exploitation in the next 30 days.

In Clojure before 1.9.0, classes can be used to construct a serialized object that executes arbitrary code upon deserialization. This is relevant if a server deserializes untrusted objects.

Affected products

• Clojure Clojure: before 1.9.0 (fixed in 1.9.0)

Published 2024-01-22. Last modified 2026-06-17.