CVE-2026-109396Thelia before 3.1.2 and 3.2.x before 3.2.1 CSV Formula Injection via Exports

Description

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.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• GitHub Security Advisory (GHSA-gcgv-f8rf-w2wc) vendor-advisory
• https://github.com/thelia/thelia/commit/c00a26f0631ed9de3c4466176db6e808a25034aa patch
• https://github.com/thelia/thelia/commit/6e46059225d87565caf4859ec0f764354e82ce95 patch
• https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/Serializer/Serializer/CSVSerializer.php technical-description
• Thelia 3.1.2 Release Notes release-notes
• Thelia 3.2.1 Release Notes release-notes
• VulnCheck Advisory: Thelia before 3.1.2 and 3.2.x before 3.2.1 CSV Formula Injection via Exports third-party-advisory