CVE-2026-2952 Vaelsys HTTP POST Request tree_server.php os command injection

Medium 6.9 Published 22 Feb 2026 Updated 25 Feb 2026

Remote attackers can execute arbitrary OS commands via the xajaxargs parameter in tree_server.php, leading to full system compromise.

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-2026-2952?

CVE-2026-2952 is a medium-severity command injection vulnerability in Vaelsys, published on 22 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw has been found in Vaelsys 4.1.0. This vulnerability affects unknown code of the file /tree/tree_server.php of the component HTTP POST Request Handler. This manipulation of the argument xajaxargs causes os command injection. The attack is possible to be carried out remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2026-2952?

It affects 1 product.

Products include Vaelsys Vaelsys.

How do I fix CVE-2026-2952?

No fix has been published for CVE-2026-2952 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2026-2952 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2952 exists.

Sources

Also known as GHSA-fwf8-cx3q-ch9g.