CVE-2026-2556 cskefu Endpoint MediaController.java server-side request forgery

Medium 5.3 Published 16 Feb 2026 Updated 23 Feb 2026

Remote attackers can exploit a server-side request forgery vulnerability in cskefu to access internal resources or bypass security controls.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-2556?

CVE-2026-2556 is a medium-severity server-side request forgery vulnerability in cskefu, published on 16 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A security vulnerability has been detected in cskefu up to 8.0.1. This issue affects some unknown processing of the file com/cskefu/cc/controller/resource/MediaController.java of the component Endpoint. The manipulation of the argument url leads to server-side request forgery. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-918

Which versions are affected by CVE-2026-2556?

It affects 1 product.

Products include Cskefu Cskefu.

How do I fix CVE-2026-2556?

No fix has been published for CVE-2026-2556 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-2556 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2556 exists.

Sources

Also known as GHSA-89wr-3g6x-pxxx.