CVE-2026-105844

Payload: Prototype pollution in Payload Import Export plugin

State: Published
Severity: 9.3 Critical
Published: Oct 6, 2026
Updated: Oct 9, 2026
Reserved: Oct 5, 2026

Description

Payload is a free and open source headless content management system. In versions from 3.0.0 before 3.88.0 and canary versions before 4.0.0-canary.27, an unauthenticated user can submit prototype-sensitive field paths when @payloadcms/plugin-import-export is enabled, causing unintended application behavior that can lead to remote code execution. This issue is fixed in versions 3.88.0 and 4.0.0-canary.27.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected Products

Product	Versions
payloadpayloadcms	>= 3.0.0, < 3.88.0Affected >= 4.0.0-canary.0, < 4.0.0-canary.27Affected
plugin-import-export@payloadcms	>= 3.0.0, < 3.88.0Affected >= 4.0.0-canary.0, < 4.0.0-canary.27Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.