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CVE-2026-105866

7.5, high

Payload is a free and open source headless content management system

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
0.4% higher than 29.7% of scored CVEs
Exploitation
No public evidence
Published
6 Oct 202611 days ago

Description

Payload is a free and open source headless content management system. In versions before 3.90.0 and canary versions before 4.0.0-canary.34, an unauthenticated attacker who knows an account email address or username can abuse the account lockout mechanism of a local-authentication collection to prevent that account from signing in. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

Details

Vendor
Payloadcms
Product
payload
Weakness
CWE-307 (opens in a new tab)
Status
Analyzed
Updated
15 Oct 2026
Assigner
security-advisories@github.com

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

References 3

Patches and fixes 2

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Payloadcms CVEs

Every Payloadcms CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-105848 Payload is a free and open source headless content management system EPSS 0.2% 9.6, critical
  • CVE-2026-105863 Payload is a free and open source headless content management system EPSS 0.4% 9.4, critical
  • CVE-2026-105849 Payload is a free and open source headless content management system EPSS 0.3% 8.3, high
  • CVE-2026-105850 Payload is a free and open source headless content management system EPSS 0.3% 8.2, high
  • CVE-2026-105851 Payloadcms payload Improper Access Control Vulnerability EPSS 0.2% 8.1, high
  • CVE-2026-105852 Payloadcms payload Missing Authorization Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-105854 Payloadcms payload Uncontrolled Resource Consumption Vulnerability EPSS 0.4% 7.5, high
  • CVE-2026-105855 Payloadcms payload Improper Access Control Vulnerability EPSS 0.2% 7.1, high

Beyond this page

Is CVE-2026-105866 in your network?

This page tells you how dangerous CVE-2026-105866 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-105866 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.