CVE-2026-109396CWE-1236

CVE-2026-109396

Medium · published October 12, 2026

CVSS v3.1
4.2
EPSS
0%
Percentile
8.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.2 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
2.3 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00189 · 8.1th percentile
Weakness
CWE-1236 · Improper Neutralization of Formula Elements in a CSV File
Published
2026-10-12T20:17Z
References (8)
https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/Serializer/Serializer/CSVSerializer.php · [email protected]https://github.com/thelia/thelia/commit/6e46059225d87565caf4859ec0f764354e82ce95 · [email protected]https://github.com/thelia/thelia/commit/c00a26f0631ed9de3c4466176db6e808a25034aa · [email protected]https://github.com/thelia/thelia/releases/tag/3.1.2 · [email protected]https://github.com/thelia/thelia/releases/tag/3.2.1 · [email protected]https://github.com/thelia/thelia/security/advisories/GHSA-gcgv-f8rf-w2wc · [email protected]https://www.vulncheck.com/advisories/thelia-before-3.1.2-and-3.2-x-before-3.2.1-csv-formula-injection-via-exports · [email protected]https://github.com/thelia/thelia/security/advisories/GHSA-gcgv-f8rf-w2wc · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 15:16Z
    Thelia before 3.1.2 and 3.2.x before 3.2.1 CSV Formula Injection via Exports
    cvelistv5
  • 12 OCT 15:16Z
    Thelia before 3.1.2 and 3.2.x before 3.2.1 CSV Formula Injection via Exports
    cvelistv5