CVE-2026-39117 Code injection in n/a
Remote attackers can execute arbitrary code in 66Uptime monitoring software via the index.php endpoint, requiring an upgrade to secure the system.
- 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-2026-39117?
CVE-2026-39117 is a critical code injection vulnerability in n/a, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue in AltumCode 66Uptime before v.54.0.0 and 66Uptime ping-servers plugin before v.2.0.0 allows a remote attacker to execute arbitrary code via the index.php
Weakness: CWE-94
Which versions are affected by CVE-2026-39117?
How do I fix CVE-2026-39117?
No fix has been published for CVE-2026-39117 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-2026-39117 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39117 exists.
Sources
Also known as GHSA-5jqg-2w8m-7xpm.