CVE-2025-26866 Apache HugeGraph-Server: RAFT and deserialization vulnerability
A malicious Raft node can achieve remote code execution via insecure Hessian deserialization in Apache HugeGraph-Server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-26866?
CVE-2025-26866 is a high-severity unsafe deserialization vulnerability in Apache HugeGraph-Server, published on 12 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A remote code execution vulnerability exists where a malicious Raft node can exploit insecure Hessian deserialization within the PD store. The fix enforces IP-based authentication to restrict cluster membership and implements a strict class whitelist to harden the Hessian serialization process against object injection attacks.
Users are recommended to upgrade to version 1.7.0, which fixes the issue.
Weakness: CWE-502
Which versions are affected by CVE-2025-26866?
2 open source packages ship an affected version, including org.apache.hugegraph:hg-pd-core. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.hugegraph:hg-pd-core Maven | All versions | 1.7.0 |
org.apache.hugegraph:hg-pd-core Maven | All versions | 1.7.0 |
Products include Apache Hugegraph.
How do I fix CVE-2025-26866?
Upgrade org.apache.hugegraph:hg-pd-core to 1.7.0 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-26866 being exploited?
There is no known exploitation of CVE-2025-26866 in the wild and no public exploit code.
Other vulnerabilities in Apache HugeGraph-Server
Sources
Also known as GHSA-q37j-3367-fwv7.