What is CVE-2026-105858?

CVE-2026-105858 is a high-severity vulnerability in Payloadcms Payload, classified under Code Injection. CVSS score: 8.1/10. Published 2026-10-06.

How severe is CVE-2026-105858?

High severity. CVSS v3 base score is 8.1 out of 10.

RCE in Payloadcms Payload

CVE-2026-105858

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, a crafted request to the public first-register operation can execute code remotely when local authentication is enabled and no initial user has been created. 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 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/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-2026-105858?: CVE-2026-105858 is a high-severity vulnerability in Payloadcms Payload, classified under Code Injection. CVSS score: 8.1/10. Published 2026-10-06.
How severe is CVE-2026-105858?: High severity. CVSS v3 base score is 8.1 out of 10.