Freeform Craft Plugin CP UI (builder/integrations) has Stored Cross-Site Scripting (XSS) issue

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

2.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P · score source

EPSS

• CVE-2026-26188: 0.30% estimated exploitation activity in the next 30 days; percentile 22.90 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary 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. Affected Product - Ecosystem: Packagist (Craft CMS plugin) - Package: solspace/craft-freeform - Version: <= 5.14.6 (latest observed). Likely all 5.x until patched. Details - Root cause: Multiple user-controlled strings (field labels, section labels, integration icons, short names, WYSIWYG previews) are injected into React components using dangerouslySetInnerHTML without sanitization. - Evidence: dangerouslySetInnerHTML on user-controlled properties in bundled CP JS at packages/plugin/src/Resources/js/client/client.js. PoCs - Label-based XSS: 1. In Craft CP, create/edit a Freeform field and set its label to <img…

Published by the source

22 Jan 2026, 21:41 UTC

Last modified by the source

13 Feb 2026, 14:57 UTC

Source last checked

26 Oct 2026, 14:38 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-jp3q-wwp3-pwv9

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# Patch Next advisory brief: CVE-2026-26188

Advisory: Freeform Craft Plugin CP UI (builder/integrations) has Stored Cross-Site Scripting (XSS) issue
IDs: CVE-2026-26188, GHSA-jp3q-wwp3-pwv9
Record: https://patchnext.com/advisories/cve-2026-26188 (revision 1, source checked 26 Oct 2026, 14:38 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 2.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: solspace/craft-freeform 5.14.7. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist solspace/craft-freeform: affected >= 5.0.0, <= 5.14.6; fixed in 5.14.7

## Suggested inspection (read-only)
- Packagist solspace/craft-freeform: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on solspace/craft-freeform.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-jp3q-wwp3-pwv9 (GitHub-reviewed advisory GHSA-jp3q-wwp3-pwv9 lists affected ranges: Packagist solspace/craft-freeform >=5.0.0 <=5.14.6)

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