What is CVE-2026-105857?

CVE-2026-105857 is a critical-severity vulnerability in Payloadcms Payload, classified under Code Injection. CVSS score: 10.0/10. Published 2026-10-06.

How severe is CVE-2026-105857?

Critical severity. CVSS v3 base score is 10.0 out of 10.

RCE in Payloadcms Payload

CVE-2026-105857

Payload is a free and open source headless content management system. In @payloadcms/plugin-form-builder versions before 3.90.0 and canary versions before 4.0.0-canary.34, an attacker can craft a form submission that executes code remotely on the server. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

Vulnerability class: RCE (Remote Code Execution)

Published 2026-10-06 · last modified 2026-10-06.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Payloadcms Payload — versions < 3.90.0, >= 4.0.0-canary.0, < 4.0.0-canary.34

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-105857?: CVE-2026-105857 is a critical-severity vulnerability in Payloadcms Payload, classified under Code Injection. CVSS score: 10.0/10. Published 2026-10-06.
How severe is CVE-2026-105857?: Critical severity. CVSS v3 base score is 10.0 out of 10.