CVE-2026-78394 Link Library < 7.9.6 - Contributor+ Path Traversal via 'filepath' Parameter
Contributors can write image files outside the web root via path traversal, allowing arbitrary file overwrites within server permissions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78394?
CVE-2026-78394 is a medium-severity path traversal vulnerability in Unknown Link Library, published on 25 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Link Library WordPress plugin before 7.9.6 does not sanitize a user-supplied destination folder before writing a generated image to disk, allowing users with the Contributor role and above to create directories and write or overwrite image files anywhere the web server can write, including outside the site's document root.
The written file name is always numeric with a fixed image extension, so executable code cannot be planted this way.
Weakness: CWE-22
Which versions are affected by CVE-2026-78394?
How do I fix CVE-2026-78394?
No fix has been published for CVE-2026-78394 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-2026-78394 being exploited?
There is no known exploitation of CVE-2026-78394 in the wild and no public exploit code.
Sources
Also known as GHSA-qx4g-fv3v-h498.