CVE-2026-26188 Freeform Craft Plugin CP UI (builder/integrations) has Stored Cross-Site Scripting (XSS) issue
Authenticated low-privilege users can inject malicious scripts into form labels, leading to stored XSS that executes when admins view the builder interface.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-26188?
CVE-2026-26188 is a medium-severity cross-site scripting vulnerability in solspace craft-freeform, published on 12 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Solspace Freeform plugin for Craft CMS 5.x is a super flexible form-building tool. An authenticated, low-privilege user (able to create/edit forms) can inject arbitrary HTML/JS into the Craft Control Panel (CP) builder and integrations views. User-controlled form labels and integration metadata are rendered with dangerouslySetInnerHTML without sanitization, leading to stored XSS that executes when any admin views the builder/integration screens. This vulnerability is fixed in 5.14.7.
Weakness: CWE-79
Which versions are affected by CVE-2026-26188?
2 open source packages ship an affected version, including solspace/craft-freeform. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
solspace/craft-freeform Packagist | From 5.0.0 | 5.14.7 |
solspace/craft-freeform Packagist | From 5.0.0 | 5.14.7 |
Products include Solspace Freeform.
How do I fix CVE-2026-26188?
Upgrade solspace/craft-freeform to 5.14.7 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-26188 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26188 exists.
Other vulnerabilities in solspace craft-freeform
Sources
Also known as GHSA-jp3q-wwp3-pwv9.