---
title: "CVE-2026-105851: Payload: Field access control bypass on auth collections"
url: https://erroneo.us/security/cve/CVE-2026-105851/
description: "CVE-2026-105851 (payload (npm)): Payload is a free and open source headless content management system. In versions from 3.0.0 before 3.90.0 and canary…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-10-06
date_modified: 2026-10-06
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-105851"
kev: false
cvss: 9.3
epss: 0.00249
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-105851: Payload: Field access control bypass on auth collections

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.2% , percentile 15: FIRST’s model estimates a 0.2% chance of exploitation activity in the next 30 days, higher than 15% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes payload (npm) > 3.0.0, < 3.90.0, fixed in 3.90.0 ; payload (npm) > 4.0.0-canary.0, < 4.0.0-canary.34, fixed in 4.0.0-canary.34 . Check your lockfile, including transitive dependencies.

## What it is

Payload is a free and open source headless content management system. In versions from 3.0.0 before 3.90.0 and canary versions before 4.0.0-canary.34, the duplicate operation copies values from a source document even when a field is hidden or its access.read or access.create rule rejects that value for the caller. The disableDuplicate setting does not prevent this access-control bypass. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

## Affected packages

- npm `payload` > 3.0.0, < 3.90.0 → fixed: 3.90.0
- npm `payload` > 4.0.0-canary.0, < 4.0.0-canary.34 → fixed: 4.0.0-canary.34

## Affected products (CVE record)

- payloadcms payload: > 3.0.0, < 3.90.0, > 4.0.0-canary.0, < 4.0.0-canary.34

## Severity

- GitHub_M CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N`
- GitHub CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.25% probability of exploitation activity in the next 30 days; percentile 15.

## Sources

- [GitHub Advisory GHSA-vc4h-q48j-5hcx](https://github.com/advisories/GHSA-vc4h-q48j-5hcx)
- [CVE.org record CVE-2026-105851](https://www.cve.org/CVERecord?id=CVE-2026-105851)
- [NVD entry CVE-2026-105851](https://nvd.nist.gov/vuln/detail/CVE-2026-105851)
- [github.com](https://github.com/payloadcms/payload/security/advisories/GHSA-vc4h-q48j-5hcx)
- [github.com](https://github.com/payloadcms/payload/commit/099ef12e2682f076aa8e8d0ccb790536b4e1027f)
- [github.com](https://github.com/payloadcms/payload/releases/tag/v3.90.0)

---
Source page: https://erroneo.us/security/cve/CVE-2026-105851/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt