CVE-2026-109396
Published:October 12, 2026
Updated:October 13, 2026
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.
Affected Packages
https://github.com/thelia/thelia.git (GITHUB):
Affected version(s) >=3.1.0 <3.1.2Fix Suggestion:
Update to version 3.1.2https://github.com/thelia/thelia.git (GITHUB):
Affected version(s) =3.2.0 <3.2.1Fix Suggestion:
Update to version 3.2.1thelia/thelia (PHP):
Affected version(s) =3.2.0 <3.2.1Fix Suggestion:
Update to version 3.2.1thelia/core (PHP):
Affected version(s) =3.2.0 <3.2.1Fix Suggestion:
Update to version 3.2.1thelia/thelia (PHP):
Affected version(s) >=3.1.0 <3.1.2Fix Suggestion:
Update to version 3.1.2thelia/backoffice-default-twig-template (PHP):
Affected version(s) >=1.0.0 <1.1.2Fix Suggestion:
Update to version 1.1.2thelia/backoffice-default-twig-template (PHP):
Affected version(s) >=1.2.0 <1.2.2Fix Suggestion:
Update to version 1.2.2thelia/core (PHP):
Affected version(s) >=3.1.0 <3.1.2Fix Suggestion:
Update to version 3.1.2Related Resources (10)
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Contact UsCVSS v4
Base Score:
2.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Formula Elements in a CSV File
EPSS
Base Score:
0.19