Thelia 2.6.1 contains an absolute path traversal vulnerability in its Smarty template handling that enables SSTI and remote code execution. The `checkTemplate()` validation restricts relative directory traversal sequences such as `../` but does not reject absolute paths, allowing an authorized user to supply an arbitrary filesystem path as a template. Smarty then loads and compiles the referenced file without an effective security policy, so depending on filesystem layout and deployment configuration, template code in the file can be executed with the web server's privileges.
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Fixes

Solution

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Workaround

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References
History

Thu, 15 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1336
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 13 Oct 2026 07:45:00 +0000

Type Values Removed Values Added
First Time appeared Thelia
Thelia thelia
Vendors & Products Thelia
Thelia thelia

Mon, 12 Oct 2026 17:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20
CWE-94

Mon, 12 Oct 2026 15:15:00 +0000

Type Values Removed Values Added
Description Thelia 2.6.1 contains an absolute path traversal vulnerability in its Smarty template handling that enables SSTI and remote code execution. The `checkTemplate()` validation restricts relative directory traversal sequences such as `../` but does not reject absolute paths, allowing an authorized user to supply an arbitrary filesystem path as a template. Smarty then loads and compiles the referenced file without an effective security policy, so depending on filesystem layout and deployment configuration, template code in the file can be executed with the web server's privileges.
Title CVE-2026-103537
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-10-15T17:06:23.101Z

Reserved: 2026-09-30T19:07:13.961Z

Link: CVE-2026-103537

cve-icon Vulnrichment

Updated: 2026-10-15T17:05:13.860Z

cve-icon NVD

Status : Deferred

Published: 2026-10-12T15:17:06.667

Modified: 2026-10-15T18:17:22.200

Link: CVE-2026-103537

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-13T07:26:59Z

Weaknesses