How severe is CVE-2025-26866?

CVE-2025-26866 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-26866 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-26866?

CVE-2025-26866 affects Apache Hugegraph. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-26866?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-26866 have an EU (EUVD) identifier?

Yes. CVE-2025-26866 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203068.

When was CVE-2025-26866 published?

CVE-2025-26866 was published on 2025-12-12 and last updated on 2026-06-17.

CVE-2025-26866

CVE-2025-26866 is a high-severity vulnerability in Apache Hugegraph with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203068
Weakness: CWE-502
Affected product: Apache Hugegraph
Published: 2025-12-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2025-26866?: CVE-2025-26866 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-26866 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-26866?: CVE-2025-26866 affects Apache Hugegraph. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-26866?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-26866 have an EU (EUVD) identifier?: Yes. CVE-2025-26866 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203068.
When was CVE-2025-26866 published?: CVE-2025-26866 was published on 2025-12-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:hugegraph:*:*:*:*:*:*:*:*

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