What is CVE-2025-26866?

CVE-2025-26866 is a high-severity vulnerability in Apache Hugegraph, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2025-12-12.

How severe is CVE-2025-26866?

High severity. CVSS v3 base score is 8.8 out of 10.

Deserialization in Apache Hugegraph

CVE-2025-26866

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 clas…

Vulnerability class: Insecure Deserialization

EPSS: 0.008 (51.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Hugegraph
Apache Software Foundation Hugegraph-server — versions 1.0.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

security@apache.org (Patch, patch, Issue Tracking)
security@apache.org (vendor-advisory, Mailing List)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List)

Frequently asked questions

What is CVE-2025-26866?: CVE-2025-26866 is a high-severity vulnerability in Apache Hugegraph, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2025-12-12.
How severe is CVE-2025-26866?: High severity. CVSS v3 base score is 8.8 out of 10.