CVE-2026-76087 Formie Craft CMS - Broken Access Control

Formie Craft CMS plugin < 2.2.23 and < 3.1.31 contains a broken access control vulnerability caused by trusting client-supplied submissionId without session binding or ownership validation in SubmissionsController::actionSubmit, letting unauthenticated attackers overwrite or hijack incomplete submissions, exploit requires sequential submission IDs.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.31% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Data Tampering, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Published
23 September 2026
Updated
15 October 2026
Weakness
CWE-639

Vendor fix

Update to versions 2.2.23 or 3.1.31 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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