CVE-2026-76087
Description
Formie is a Craft CMS plugin for creating forms. Prior to 2.2.23 and 3.1.31, Formie's anonymous formie/submissions/submit action in SubmissionsController::actionSubmit trusts a client-supplied submissionId when loading an incomplete submission without session binding, ownership validation, or a valid submissionEditToken. An unauthenticated attacker can enumerate sequential IDs and overwrite or hijack another user's in-progress multi-page or save-for-later submission, and the modified data can be persisted and forwarded through notifications or integrations when the submission is completed. This is an incomplete remediation of CVE-2026-47266 because that earlier change validated edit tokens for save-submission but did not protect submit. Completed submissions are excluded by the isIncomplete filter. This issue is fixed in versions 2.2.23 and 3.1.31.
How to fix
- verbb/formie3.1.31, 2.2.23 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| verbb/formiePackagist | 3.0.0 ≤ v < 3.1.31, v < 2.2.23 | 3.1.31, 2.2.23 |
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