CVE-2020-11995: Apache Dubbo

Critical severity, CVSS 9.8. EPSS: 5.9% chance of exploitation in the next 30 days.

A deserialization vulnerability existed in dubbo 2.7.5 and its earlier versions, which could lead to malicious code execution. Most Dubbo users use Hessian2 as the default serialization/deserialization protool, during Hessian2 deserializing the HashMap object, some functions in the classes stored in HasMap will be executed after a series of program calls, however, those special functions may cause remote command execution. For example, the hashCode() function of the EqualsBean class in rome-1.7.0.jar will cause the remotely load malicious classes and execute malicious code by constructing a malicious request. This issue was fixed in Apache Dubbo 2.6.9 and 2.7.8.

Affected products

• Apache Dubbo: from 2.5.0, up to and including 2.5.10; from 2.6.0, up to and including 2.6.8; from 2.7.0, up to and including 2.7.7

Published 2021-01-11. Last modified 2026-06-17.