CVE-2026-91751 Flextype CMS through 1.0.0-alpha.3 Path Traversal via Entries REST API
Attackers with API tokens can exploit path traversal in the Entries REST API to read or overwrite arbitrary files outside the intended directory.
- 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-2026-91751?
CVE-2026-91751 is a high-severity path traversal vulnerability in flextype, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Flextype CMS through 1.0.0-alpha.3 fails to properly validate id and new_id parameters in the Entries REST API, allowing API token holders to read, create, or overwrite files outside the entries directory. Attackers can use traversal sequences in API requests to escape the project entries directory and manipulate arbitrary files and directories on the filesystem.
Weakness: CWE-22
Which versions are affected by CVE-2026-91751?
How do I fix CVE-2026-91751?
No fix has been published for CVE-2026-91751 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-2026-91751 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91751 exists.
Sources
Also known as GHSA-63h9-h8w7-v6fr.