CVE-2026-34110 Guardian Language-System Unauthenticated OS Command Injection via id Parameter in complex_start.php
Unauthenticated attackers can execute arbitrary OS commands via the id parameter in complex_start.php due to lack of input sanitization.
- 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-2026-34110?
CVE-2026-34110 is a critical command injection vulnerability in guardian language-system, published on 1 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Guardian language-system passes the id GET parameter directly into a PHP exec() call in complex_start.php (line 14) without sanitization: exec(\"php jobs/complex.php \".$login_session.\" \".$_GET['id'].\" ...\"). No authentication is required. An unauthenticated remote attacker can append shell metacharacters to execute arbitrary OS commands on the server.
Weakness: CWE-78
Which versions are affected by CVE-2026-34110?
How do I fix CVE-2026-34110?
No fix has been published for CVE-2026-34110 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-2026-34110 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34110 exists.
Sources
Also known as GHSA-8jg8-r264-q28x.