---
title: "CVE-2026-105866: Payload - Authentication Bypass"
description: "Payload before 3.90.0 and canary versions before 4.0.0-canary.34 contain an account lockout abuse vulnerability caused by improper handling of local-authentication collections, letting unauthenticated attackers prevent account sign-in by triggering lockout, exploit requires knowledge of account email or username."
url: https://panop.io/threat-heartbeat/CVE-2026-105866/
---

# CVE-2026-105866 Payload - Authentication Bypass

Payload before 3.90.0 and canary versions before 4.0.0-canary.34 contain an account lockout abuse vulnerability caused by improper handling of local-authentication collections, letting unauthenticated attackers prevent account sign-in by triggering lockout, exploit requires knowledge of account email or username.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.35% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-105866)

## Details

Type

Authentication Bypass

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

6 October 2026

Updated

15 October 2026

Weakness

[CWE-307](https://cwe.mitre.org/data/definitions/307.html)

## Vendor fix

Update to version 3.90.0 or 4.0.0-canary.34 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-105866](https://nvd.nist.gov/vuln/detail/CVE-2026-105866)
- [https://github.com/payloadcms/payload/commit/1c46204a73a0a9f988a80c52690eee5a4ada3cf1](https://github.com/payloadcms/payload/commit/1c46204a73a0a9f988a80c52690eee5a4ada3cf1)
- [https://github.com/payloadcms/payload/releases/tag/v3.90.0](https://github.com/payloadcms/payload/releases/tag/v3.90.0)
- [https://github.com/payloadcms/payload/security/advisories/GHSA-v5gf-vpjc-pc7w](https://github.com/payloadcms/payload/security/advisories/GHSA-v5gf-vpjc-pc7w)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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