High severity · published Oct 12, 2026
CVE-2026-109397
Thelia before 3.1.2 and 3.2.x before 3.2.1 File Upload RCE via Filename Trailing Space
7.2
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TH
Thelia · Thelia
before 3.1.2; 3.2.0 before 3.2.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109397
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109397
vendor-advisory
https://github.com/thelia/thelia/security/advisories/GHSA-5524-qfxp-33v9
patch
https://github.com/thelia/thelia/commit/6b706f5cb96e6b12d890c6d16edb1c9d1fd8191a
patch
https://github.com/thelia/thelia/commit/b71258902b5dd278007d0f37ddad45f76d06d5bc
technical-description
https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/File/Service/FileProcessorService.php#L119-L160
release-notes
https://github.com/thelia/thelia/releases/tag/3.1.2
release-notes
https://github.com/thelia/thelia/releases/tag/3.2.1
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