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Advisory record · GHSA-r488-j9vj-wx3q

Payload Form Builder has an RCE issue

CVSS 10.0 CriticalCriticalEPSS 0.0043 · 37th percentile

Critical, because:

  • CVSS score 10.0: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 7 Oct 2026, 20:28 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
@payloadcms/plugin-form-buildernpm<3.90.0 || >=4.0.0-canary.0, <4.0.0-canary.343.90.0, 4.0.0-canary.34
Identifiers
GHSA-r488-j9vj-wx3q · CVE-2026-105857
Weakness (CWE)
CWE-94 · CWE-1321
Tags
Published
7 Oct 2026
Updated
7 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The @payloadcms/plugin-form-builder npm package is vulnerable in versions before 3.90.0 and in 4.0.0 canary builds before 4.0.0-canary.34. The source says that form submissions can be crafted to execute remote code on the server, but it gives no detail on what an attacker must already have, such as network access or an account. Upgrade @payloadcms/plugin-form-builder to 3.90.0 or later, or to 4.0.0-canary.34 or later on the 4.0 canary line.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
10.0 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0043, the 37th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:33 UTC First seen by agentprime
  2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.