# CVE-2026-91751

## Summary

- **CVE ID:** CVE-2026-91751
- **Severity:** HIGH
- **CVSS Score:** 8.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-22
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## 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.

## Affected Products

- flextype — flextype (0)

## References

- [CNA](https://github.com/flextype/flextype/issues/596)
- [CNA](https://github.com/flextype/flextype)
- [CNA](https://github.com/flextype/flextype/blob/v1.0.0-alpha.3/src/flextype/core/Entries/Entries.php#L856-L906)
- [CNA](https://www.vulncheck.com/advisories/flextype-cms-through-1.0.0-alpha.3-path-traversal-via-entries-rest-api)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.0

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._