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.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-1236"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109396.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "3.1.2"
},
{
"introduced": "3.2.0"
},
{
"fixed": "3.2.1"
}
],
"source": "AFFECTED_FIELD"
}