---
title: "CVE-2026-109397: Thelia - Unrestricted File Upload"
description: "Thelia < 3.1.2 and 3.2.x < 3.2.1 contain an unrestricted file upload vulnerability caused by inconsistent filename sanitization in FileProcessorService and FileManager::sanitizeFileName(), letting authenticated back-office users upload executable PHP files for code execution as the web server user."
url: https://panop.io/threat-heartbeat/CVE-2026-109397/
---

# CVE-2026-109397 Thelia - Unrestricted File Upload

Thelia < 3.1.2 and 3.2.x < 3.2.1 contain an unrestricted file upload vulnerability caused by inconsistent filename sanitization in FileProcessorService and FileManager::sanitizeFileName(), letting authenticated back-office users upload executable PHP files for code execution as the web server user.

CVSS base score 7.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.44% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-109397)

## Details

Type

Unrestricted File Upload

Impact

Remote Code Execution

CVSS vector

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

Published

12 October 2026

Updated

15 October 2026

Weakness

[CWE-434](https://cwe.mitre.org/data/definitions/434.html)

## Vendor fix

Upgrade to version 3.1.2 or 3.2.1 or later.

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-2026-109397](https://nvd.nist.gov/vuln/detail/CVE-2026-109397)
- [https://github.com/thelia/thelia/security/advisories/GHSA-5524-qfxp-33v9](https://github.com/thelia/thelia/security/advisories/GHSA-5524-qfxp-33v9)
- [https://www.vulncheck.com/advisories/thelia-before-3.1.2-and-3.2-x-before-3.2.1-file-upload-rce-via-filename-trailing-space](https://www.vulncheck.com/advisories/thelia-before-3.1.2-and-3.2-x-before-3.2.1-file-upload-rce-via-filename-trailing-space)
- [https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/File/Service/FileProcessorService.php#L119-L160](https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/File/Service/FileProcessorService.php#L119-L160)
- [https://github.com/thelia/thelia/commit/6b706f5cb96e6b12d890c6d16edb1c9d1fd8191a](https://github.com/thelia/thelia/commit/6b706f5cb96e6b12d890c6d16edb1c9d1fd8191a)
- [https://github.com/thelia/thelia/commit/b71258902b5dd278007d0f37ddad45f76d06d5bc](https://github.com/thelia/thelia/commit/b71258902b5dd278007d0f37ddad45f76d06d5bc)
- [https://github.com/thelia/thelia/releases/tag/3.1.2](https://github.com/thelia/thelia/releases/tag/3.1.2)
- [https://github.com/thelia/thelia/releases/tag/3.2.1](https://github.com/thelia/thelia/releases/tag/3.2.1)

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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

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