CVE-2019-17556: Apache Olingo

Critical severity, CVSS 9.8. EPSS: 3.6% chance of exploitation in the next 30 days.

Apache Olingo versions 4.0.0 to 4.6.0 provide the AbstractService class, which is public API, uses ObjectInputStream and doesn't check classes being deserialized. If an attacker can feed malicious metadata to the class, then it may result in running attacker's code in the worse case.

Affected products

• Apache Olingo: from 4.0.0, up to and including 4.6.0

Published 2019-12-04. Last modified 2026-06-17.