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CVE-2026-103537 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CNA: CISA-ADPCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://kb.cert.org/vuls/id/162329	[email protected]	AdvisoryBundleRemedy

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1336	Improper Neutralization of Special Elements Used in a Template Engine	CISA-ADP
CWE-94	Improper Control of Generation of Code ('Code Injection')	CISA-ADP

Affected Products

Product	Versions
Thelia	2.6.0 (semver) 2.6.1 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Workaround:low effort Restrict access to Thelia administrative interfaces, disable or tightly limit file-upload and template-editing features, and remove PHP execution permissions from user-writable directories wherever possible. Mitigation:low effort Apply strict reverse-proxy controls such as rate limiting, MIME filtering, and URL allowlisting.

Product

Versions

Thelia

2.6.0 (semver)

2.6.1 (semver)

CPE

No CPEs found in CPE dictionary for this product.

Remediation

Workaround:low effort
Restrict access to Thelia administrative interfaces, disable or tightly limit file-upload and template-editing features, and remove PHP execution permissions from user-writable directories wherever possible.
Mitigation:low effort
Apply strict reverse-proxy controls such as rate limiting, MIME filtering, and URL allowlisting.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 15, 2026	CVE Modified	CISA-ADP
Oct 12, 2026	New CVE Received	[email protected]