CVE-2026-54243 Statamic: CSV formula injection in form submission exports
Attackers can inject malicious formulas into CSV exports via form submissions, potentially executing code when editors open the file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-54243?
CVE-2026-54243 is a medium-severity vulnerability in statamic cms, published on 17 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Statamic is a Laravel and Git powered content management system (CMS). Prior to 5.73.24 and 6.20.1, form submission values in src/Forms/Exporters/CsvExporter.php were not neutralized for spreadsheet formula characters when exported to CSV. A submission containing a value beginning with a formula trigger character, such as =, +, -, or @, could be interpreted as a live formula when a Control Panel user opens the export in a spreadsheet application. Form submissions can come from unauthenticated front-end visitors, so the malicious value can be supplied by an anonymous user and is later triggered by an editor opening the export. This issue is fixed in versions 5.73.24 and 6.20.1.
Weakness: CWE-1236
Which versions are affected by CVE-2026-54243?
4 open source packages ship an affected version, including statamic/cms.
| Package | Affected | Fixed in |
|---|---|---|
statamic/cms Packagist | All versions | 5.73.24 |
statamic/cms Packagist | All versions | 5.73.24 |
statamic/cms Packagist | From 6.0.0 | 6.20.1 |
statamic/cms Packagist | From 6.0.0 | 6.20.1 |
How do I fix CVE-2026-54243?
Upgrade statamic/cms to a fixed version for your release line: 5.73.24 or 6.20.1.
Is CVE-2026-54243 being exploited?
There is no known exploitation of CVE-2026-54243 in the wild and no public exploit code.
Sources
Also known as GHSA-h77m-qrj7-jxcw.