---
title: "CVE-2026-91751: Flextype CMS - Path Traversal"
description: "Flextype CMS through 1.0.0-alpha.3 contains a path traversal caused by improper validation of id and new_id parameters in the Entries REST API, letting API token holders read, create, or overwrite arbitrary files outside the entries directory, exploit requires API token."
url: https://panop.io/threat-heartbeat/CVE-2026-91751/
---

# CVE-2026-91751 Flextype CMS - Path Traversal

Flextype CMS through 1.0.0-alpha.3 contains a path traversal caused by improper validation of id and new\_id parameters in the Entries REST API, letting API token holders read, create, or overwrite arbitrary files outside the entries directory, exploit requires API token.

CVSS base score 8.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.54% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-91751)

## Details

Type

Path Traversal

Impact

File System Read, File System Write

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

Published

15 September 2026

Updated

15 October 2026

Weakness

[CWE-22](https://cwe.mitre.org/data/definitions/22.html)

## Vendor fix

Update to the latest version beyond 1.0.0-alpha.3.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-91751](https://nvd.nist.gov/vuln/detail/CVE-2026-91751)
- [https://github.com/flextype/flextype](https://github.com/flextype/flextype)
- [https://github.com/flextype/flextype/blob/v1.0.0-alpha.3/src/flextype/core/Entries/Entries.php#L856-L906](https://github.com/flextype/flextype/blob/v1.0.0-alpha.3/src/flextype/core/Entries/Entries.php#L856-L906)
- [https://github.com/flextype/flextype/issues/596](https://github.com/flextype/flextype/issues/596)
- [https://www.vulncheck.com/advisories/flextype-cms-through-1.0.0-alpha.3-path-traversal-via-entries-rest-api](https://www.vulncheck.com/advisories/flextype-cms-through-1.0.0-alpha.3-path-traversal-via-entries-rest-api)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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