Is CVE-2026-8739 actively exploited?

No active exploitation of CVE-2026-8739 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-8739 be exploited remotely?

Yes. CVE-2026-8739 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-8739?

CVE-2026-8739 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-8739

CWE-320Published: May 17, 2026· Updated: May 18, 2026

5.3

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:8.1th

Official Description

A vulnerability was detected in Sanluan PublicCMS 5.202506.d. The affected element is the function getSignKey of the file publiccms-core/src/main/java/com/publiccms/logic/component/config/SafeConfigComponent.java. The manipulation of the argument privatefile_key results in use of hard-coded cryptographic key . The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

NVD Source

Technical Analysis

CVE-2026-8739 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.