CVE-2017-12620: Apache Opennlp

Critical severity, CVSS 9.8. EPSS: 3% chance of exploitation in the next 30 days.

When loading models or dictionaries that contain XML it is possible to perform an XXE attack, since Apache OpenNLP is a library, this only affects applications that load models or dictionaries from untrusted sources. The versions 1.5.0 to 1.5.3, 1.6.0, 1.7.0 to 1.7.2, 1.8.0 to 1.8.1 of Apache OpenNLP are affected.

Affected products

• Apache Opennlp: version 1.5.0 only; version 1.5.1 only; version 1.5.2 only; version 1.5.3 only; version 1.6.0 only; version 1.7.0 only; …

Published 2017-10-03. Last modified 2026-06-17.