CVE-2026-8739 Sanluan PublicCMS SafeConfigComponent.java getSignKey hard-coded key
Remote attackers can exploit a hard-coded cryptographic key in PublicCMS to bypass security mechanisms, as the vendor has not provided a fix.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8739?
CVE-2026-8739 is a medium-severity vulnerability in Sanluan PublicCMS, published on 17 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-8739?
How do I fix CVE-2026-8739?
No fix has been published for CVE-2026-8739 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-8739 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8739 exists.
Sources
Also known as GHSA-2352-54f8-q7h5.