CVE-2026-109396

MEDIUMCVSS 4.2/10EPSS 0.19%

Last modified

CVE-2026-109396 is a medium-severity vulnerability rated 4.2/10 on the CVSS scale. 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.. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
TheliaThelia< 3.1.2; >= 3.2.0, < 3.2.1

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is 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.
How severe is CVE-2026-109396?
CVE-2026-109396 has a CVSS score of 4.2/10 (MEDIUM severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.
How do I fix CVE-2026-109396?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

Are you affected by CVE-2026-109396?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST