Vulnerability in Sanluan Publiccms
CVE-2026-8739
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Sanluan Publiccms — versions 5.202506.d
Weakness classification (CWE)
References
- vuldb.com/vuln/364327 (technical-description, vdb-entry)
- vuldb.com/vuln/364327/cti (signature, permissions-required)
- vuldb.com/submit/809917 (third-party-advisory)
- vulnplus-note.wetolink.com/share/PCVUlOncmwTC (exploit)
Frequently asked questions
- What is CVE-2026-8739?
- CVE-2026-8739 is a medium-severity vulnerability in Sanluan Publiccms, classified under CWE-320. CVSS score: 5.3/10. Published 2026-05-17.
- How severe is CVE-2026-8739?
- Medium severity. CVSS v3 base score is 5.3 out of 10.