Critical severity · published May 29, 2026
CVE-2026-45697
Formie: Pre-authenticated server-side template injection in Hidden fields
9.8
CVSS
0.5%
EPSS
No
On KEV
Description
Formie is a Craft CMS plugin for creating forms. Prior to 2.2.20 and 3.1.24, unauthenticated users could submit crafted values into Hidden fields (with Default value → Custom) that were evaluated as Twig during submission handling, which could lead to serious compromise of the Craft site (depending on template/sandbox behavior). This vulnerability is fixed in 2.2.20 and 3.1.24.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
formie · verbb
< 2.2.20; >= 3.0.0-beta.1, < 3.1.24 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45697
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45697
github.com
https://github.com/verbb/formie/commit/f690d5623163ce2a95da305238d6367575486ee3
github.com
https://github.com/verbb/formie/releases/tag/2.2.20
github.com
https://github.com/verbb/formie/releases/tag/3.1.24
github.com
https://github.com/verbb/formie/security/advisories/GHSA-x7m9-mwc2-g6w2
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