CVE-2021-43297: Dubbo Hessian cause RCE when parse error

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 16.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-01-10 · updated 2026-06-17
Weakness: CWE-502

Description

A deserialization vulnerability existed in dubbo hessian-lite 3.2.11 and its earlier versions, which could lead to malicious code execution. Most Dubbo users use Hessian2 as the default serialization/deserialization protocol, during Hessian catch unexpected exceptions, Hessian will log out some imformation for users, which may cause remote command execution. This issue affects Apache Dubbo Apache Dubbo 2.6.x versions prior to 2.6.12; Apache Dubbo 2.7.x versions prior to 2.7.15; Apache Dubbo 3.0.x versions prior to 3.0.5.

Affected products

Apache Software Foundation Apache Dubbo: from 2.6.0 before 2.6.12; from 2.7.0 before 2.7.15; from 3.0.0 before 3.0.5 — fixed in 2.6.12, 2.7.15, 3.0.5

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Dubbo 2.6.12, 2.7.15, 3.0.5. Check the vendor advisory for mitigations.

References

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