Unsafe deserialization in providers using the Hessian protocol
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-502.
Summary
In Apache Dubbo, users may choose to use the Hessian protocol. The Hessian protocol is implemented on top of HTTP and passes the body of a POST request directly to a HessianSkeleton: New HessianSkeleton are created without any configuration of the serialization factory and therefore without applying the dubbo properties for applying allowed or blocked type lists. In addition, the generic service is always exposed and therefore attackers do not need to figure out a valid service/method name pair. This is fixed in 2.7.13, 2.6.10.1
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Dubbo | Apache Dubbo 2.7.x – 2.7.12; Apache Dubbo 2.6.x – 2.6.10 | — | No fix listed | CNA |
| — | org.apache.dubbo:dubbo (Maven) | 2.7.0 to before 2.7.13 | 2.7.13 | Patch available | GHSA-cpx9-4rwv-486v |
| — | org.apache.dubbo:dubbo (Maven) | before 2.6.10.1 | 2.6.10.1 | Patch available | GHSA-cpx9-4rwv-486v |
- Apache Dubbo VendorApache Affected Apache Dubbo 2.7.x – 2.7.12; Apache Dubbo 2.6.x – 2.6.10 Fixed in — No fix listed CNA
- org.apache.dubbo:dubbo (Maven) Vendor— Affected 2.7.0 to before 2.7.13 Fixed in 2.7.13 Patch available GHSA-cpx9-4rwv-486v
- org.apache.dubbo:dubbo (Maven) Vendor— Affected before 2.6.10.1 Fixed in 2.6.10.1 Patch available GHSA-cpx9-4rwv-486v
Remediation
- Fix · GHSA-cpx9-4rwv-486v org.apache.dubbo:dubbo (Maven) Fixed in 2.7.13 Advisory →
- Fix · GHSA-cpx9-4rwv-486v org.apache.dubbo:dubbo (Maven) Fixed in 2.6.10.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36163
- 2026-10-03 Alias added: GHSA-cpx9-4rwv-486v
References
Advisory 2
More Apache Dubbo vulnerabilities
- TI-2021-12489 Regular expression Denial of Service in MooTools CVSS 3.1CRITICAL 9.8
- TI-2021-10721 Apache Dubbo RCE on customers via Script route poisoning (Nashorn script injection) CVSS 3.1CRITICAL 9.8
- TI-2021-10720 Apache Dubbo RCE on customers via Condition route poisoning (Unsafe YAML unmarshaling) CVSS 3.1CRITICAL 9.8
- TI-2019-13107 Deserialization of untrusted data in Apache Dubbo CVSS 3.1CRITICAL 9.8
- TI-2021-07774 Dubbo Zookeeper does not check serialization id CVSS 3.1CRITICAL 9.8
- TI-2021-19290 Dubbo Hessian cause RCE when parse error CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-36163 · CVE Program
- CVE-2021-36163 · NVD
- FIRST EPSS
- GHSA-cpx9-4rwv-486v · GitHub Advisory Database · CC BY 4.0
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