CVE-2026-5987 Code injection in PublicCMS
Remote attackers can execute arbitrary code via template injection in PublicCMS FreeMarker handler, requiring immediate attention due to public exploit availability.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5987?
CVE-2026-5987 is a medium-severity code injection vulnerability in Sanluan PublicCMS, published on 9 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A security vulnerability has been detected in Sanluan PublicCMS up to 6.202506.d. This affects the function AbstractFreemarkerView.doRender of the file publiccms-parent/publiccms-core/src/main/java/com/publiccms/common/base/AbstractFreemarkerView.java of the component FreeMarker Template Handler. Such manipulation leads to improper neutralization of special elements used in a template engine. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-5987?
How do I fix CVE-2026-5987?
No fix has been published for CVE-2026-5987 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-5987 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5987 exists.
Sources
Also known as GHSA-v5c9-pmxr-9vhc.