CVE-2026-18644 danpros HTMLy Delete Username Endpoint htmly.php unlink path traversal
Remote attackers can exploit a path traversal vulnerability in the Delete Username Endpoint to delete arbitrary files via the unlink function.
- 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-2026-18644?
CVE-2026-18644 is a medium-severity path traversal vulnerability in danpros HTMLy, published on 3 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was identified in danpros HTMLy up to 3.1.1. Affected by this issue is the function unlink of the file /system/htmly.php of the component Delete Username Endpoint. Such manipulation of the argument File leads to path traversal. The attack can be launched remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-22
Which versions are affected by CVE-2026-18644?
How do I fix CVE-2026-18644?
No fix has been published for CVE-2026-18644 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-18644 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18644 exists.
Sources
Also known as GHSA-g2qx-6r2x-hr8v.