CVE-2026-105858

Payload: Remote Code Execution through first-register

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.

Affected

payloadcms · payload

CVSS v3.1 GITHUB

8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.48% chance of exploitation in the next 30 days, 40th percentile

Published

2026-10-06

Updated

2026-10-09

Proof-of-concept exploits (2)

• payloadcms/payload/security/advisories/GHSA-97rh-rhh2-7vjv
• payloadcms/payload/releases/tag/v3.90.045286★ · 2026-10-16

Security advisories

• advisories/GHSA-97rh-rhh2-7vjv

References

• CVE Record
• NVD entry

Related

• CVE-2022-27952
• CVE-2023-30843
• CVE-2025-4643
• CVE-2025-4644
• CVE-2026-105804
• CVE-2026-105805