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CVE-2026-47266

Formie: Unauthenticated front-end submission editing can overwrite existing submissions

8.7 HighFix available

Formie is a Craft CMS plugin for creating forms. Prior to 2.2.21 and 3.1.26, unauthenticated users could modify existing submissions by posting a known or guessed submission ID to formie/submissions/save-submission. This vulnerability is fixed in 2.2.21 and 3.1.26.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
None

Exploit likelihood

0.31%Up 0.3 points since May 30, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.7

Formie: Unauthenticated front-end submission editing can overwrite existing submissions

Formie is a Craft CMS plugin for creating forms. Prior to 2.2.21 and 3.1.26, unauthenticated users could modify existing submissions by posting a known or guessed submission ID to formie/submissions/save-submission. This vulnerability is fixed in 2.2.21 and 3.1.26.

Record
CVE-2026-47266
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-639
Updated
2026-11-02
EUVDEUVD-2026-33422 8.7

Formie is a Craft CMS plugin for creating forms. Prior to 2.2.21 and 3.1.26, unauthenticated users could modify existing submissions by posting a known or guessed submission ID to formie/submissions/save-submission. This vulnerability is fixed in 2.2.21 and 3.1.26.

Record
EUVD-2026-33422
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-pgxq-p76c-x9cg 8.7

formie's unauthenticated front-end submission editing can overwrite existing submissions

Impact

Unauthenticated users could modify existing submissions by posting a known or guessed submission ID to formie/submissions/save-submission.

Patches

2.2.21, 3.1.26

Workarounds

Block unauthenticated access to actions/formie/submissions/save-submission, or disable/customize front-end submission editing until patched.

Credit

formie extends many thanks to:

Record
GHSA-pgxq-p76c-x9cg
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-639
Updated
2026-11-02
NVD 8.7

Formie is a Craft CMS plugin for creating forms. Prior to 2.2.21 and 3.1.26, unauthenticated users could modify existing submissions by posting a known or guessed submission ID to formie/submissions/save-submission. This vulnerability is fixed in 2.2.21 and 3.1.26.

Record
CVE-2026-47266
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-639
Updated
2026-11-02
OSV 8.7

Formie: Unauthenticated front-end submission editing can overwrite existing submissions

Formie is a Craft CMS plugin for creating forms. Prior to 2.2.21 and 3.1.26, unauthenticated users could modify existing submissions by posting a known or guessed submission ID to formie/submissions/save-submission. This vulnerability is fixed in 2.2.21 and 3.1.26.

Record
CVE-2026-47266
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-639
Updated
2026-11-02
OSVGHSA-pgxq-p76c-x9cg 8.7

formie's unauthenticated front-end submission editing can overwrite existing submissions

Impact

Unauthenticated users could modify existing submissions by posting a known or guessed submission ID to formie/submissions/save-submission.

Patches

2.2.21, 3.1.26

Workarounds

Block unauthenticated access to actions/formie/submissions/save-submission, or disable/customize front-end submission editing until patched.

Credit

formie extends many thanks to:

Record
GHSA-pgxq-p76c-x9cg
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-639
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
verbb/formie
Packagist
 3.0.0 up to 3.1.26
3.1.26
verbb/formie
Packagist
 before 2.2.21
2.2.21
verbb/formie
Packagist
 3.0.0 up to 3.1.26, plus listed versions
3.0.13.0.103.0.113.0.123.0.13
Show 45 moreShow less
3.0.143.0.153.0.163.0.173.0.183.0.193.0.23.0.203.0.213.0.223.0.233.0.243.0.253.0.263.0.273.0.283.0.293.0.33.0.303.0.313.0.323.0.43.0.53.0.63.0.73.0.83.0.93.1.03.1.13.1.103.1.113.1.123.1.133.1.143.1.153.1.163.1.173.1.183.1.193.1.23.1.203.1.213.1.223.1.233.1.24
3.1.26
verbb/formie
Packagist
 before 2.2.21, plus listed versions
1.0.01.0.11.0.21.0.31.0.4
Show 45 moreShow less
1.0.51.0.61.0.71.0.81.0.91.0.9.11.1.01.1.11.1.1.11.1.21.1.31.1.41.1.4.11.1.51.1.61.1.71.1.81.2.01.2.11.2.101.2.111.2.121.2.131.2.141.2.151.2.161.2.171.2.181.2.191.2.21.2.201.2.211.2.221.2.231.2.23.11.2.241.2.251.2.261.2.271.2.281.2.31.2.41.2.51.2.61.2.7
2.2.21

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-47266 is a high vulnerability (CVSS 8.7) in Verbb Formie, published May 29, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.31%, the 24th percentile. Fixed in verbb/formie 3.1.26.

References

This page doesn't list everything

Left out here: 284 versions. The JSON record has them.

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