CVE-2026-105844

Payload: Prototype pollution in Payload Import Export plugin

At a glance

Severity: CRITICAL 9.3
EPSS: EPSS 0.71 % · percentile 53 (2026-10-27)
State: PUBLISHED
Published: 2026-10-06
Updated: 2026-10-09
Assigner: GitHub_M
NVD status: Undergoing Analysis

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

Version	Score	Vector	Scored by
CVSS 4.0	CRITICAL 9.3	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
CVSS 4.0	CRITICAL 9.3	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD · security-advisories@github.com (Secondary)

Weaknesses (CWE)

CWE-1321

Advisories

GHSA-qf28-8hc6-vwrp — Payload: Prototype pollution in Payload Import Export plugin

European references

ENISA EUVD · EUVD-2026-93470
GCVE · GCVE-0-2026-105844

Affected products

Product	Versions
payloadcms · payload	affected >= 3.0.0, < 3.88.0 ; affected >= 4.0.0-canary.0, < 4.0.0-canary.27
@payloadcms · plugin-import-export	affected >= 3.0.0, < 3.88.0 ; affected >= 4.0.0-canary.0, < 4.0.0-canary.27

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD