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High, CVSS 8.7

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

CVE-2026-47266GHSA-pgxq-p76c-x9cg

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (verbb/formie 3.1.26, 2.2.21), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Packagist verbb/formie

    Affected
    >= 3.0.0, < 3.1.26< 2.2.21
    Fixed in
    3.1.26, 2.2.21

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
8.7 · 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/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 · score source
EPSS
  • CVE-2026-47266: 0.31% estimated exploitation activity in the next 30 days; percentile 24.13 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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: - Florian (Cyber Security Engineer, arcade solutions ag) - Contact: security@arcade.ch

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-pgxq-p76c-x9cg

Agent brief

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# Patch Next advisory brief: CVE-2026-47266

Advisory: formie's unauthenticated front-end submission editing can overwrite existing submissions
IDs: CVE-2026-47266, GHSA-pgxq-p76c-x9cg
Record: https://patchnext.com/advisories/cve-2026-47266 (revision 1, source checked 26 Oct 2026, 14:48 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: verbb/formie 3.1.26, 2.2.21. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist verbb/formie: affected >= 3.0.0, < 3.1.26; < 2.2.21; fixed in 3.1.26, 2.2.21

## Suggested inspection (read-only)
- Packagist verbb/formie: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on verbb/formie.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-pgxq-p76c-x9cg (GitHub-reviewed advisory GHSA-pgxq-p76c-x9cg lists affected ranges: Packagist verbb/formie >=3.0.0 =0 <2.2.21)

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