Is CVE-2026-5987 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-5987, but active exploitation has not been confirmed.

Can CVE-2026-5987 be exploited remotely?

Yes. CVE-2026-5987 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5987?

CVE-2026-5987 has a CVSS score of 4.7 (MEDIUM).

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MEDIUMPOC

CVE-2026-5987

CWE-791Published: April 9, 2026· Updated: Apr 13, 2026

4.7

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.1th

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.

NVD Source

Technical Analysis

CVE-2026-5987 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2026-5987. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.