CVE-2026-109396

Thelia before 3.1.2 and 3.2.x before 3.2.1 contains a CSV formula injection vulnerability that allows unauthenticated visitors to inject spreadsheet formulas by supplying crafted registration, checkout or newsletter fields. Attackers can submit names, addresses or phone values starting with =, +, - or @ that CSVSerializer exports verbatim, executing formulas in the administrator's spreadsheet application.

CVSS v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/Serializer/Serializer/CSVSerializer.php
https://github.com/thelia/thelia/commit/6e46059225d87565caf4859ec0f764354e82ce95
https://github.com/thelia/thelia/commit/c00a26f0631ed9de3c4466176db6e808a25034aa
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/security/advisories/GHSA-gcgv-f8rf-w2wc
https://www.vulncheck.com/advisories/thelia-before-3.1.2-and-3.2-x-before-3.2.1-csv-formula-injection-via-exports
https://github.com/thelia/thelia/security/advisories/GHSA-gcgv-f8rf-w2wc

Configurations

No configuration.

History

13 Oct 2026, 16:17

Type	Values Removed	Values Added
References	~~() https://github.com/thelia/thelia/security/advisories/GHSA-gcgv-f8rf-w2wc -~~	() https://github.com/thelia/thelia/security/advisories/GHSA-gcgv-f8rf-w2wc -

12 Oct 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-12 16:17

Updated : 2026-10-13 20:41

NVD link : CVE-2026-109396

Mitre link : CVE-2026-109396

CVE.ORG link : CVE-2026-109396

JSON object : View

Products Affected

No product.

CWE

CWE-1236

Improper Neutralization of Formula Elements in a CSV File

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