CVE-2026-90581 cym1102 nginxWebUI autoUpdate MainController.autoUpdate code injection
Remote attackers can execute arbitrary code via the autoUpdate function in nginxWebUI, requiring immediate patching.
- 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-2026-90581?
CVE-2026-90581 is a medium-severity code injection vulnerability in cym1102 nginxWebUI, published on 13 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was determined in cym1102 nginxWebUI up to 4.4.2. This issue affects the function MainController.autoUpdate of the file /adminPage/main/autoUpdate. This manipulation of the argument url causes code injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.
Which versions are affected by CVE-2026-90581?
How do I fix CVE-2026-90581?
No fix has been published for CVE-2026-90581 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-2026-90581 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90581 exists.
Sources
Also known as GHSA-8mrj-3xx2-r42f.