Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M
CVE-2026-105844Payload: Prototype pollution in Payload Import Export plugin
Critical 9.3
In plain English
A critical-severity prototype pollution in payload from payloadcms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @payloadcms/plugin-import-export | 3.88.0 | GHSA-qf28-8hc6-vwrp |
| npm | @payloadcms/plugin-import-export | 4.0.0-canary.27 | GHSA-qf28-8hc6-vwrp |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| payloadcms | payload | >= 3.0.0, < 3.88.0>= 4.0.0-canary.0, < 4.0.0-canary.27 |
| @payloadcms | plugin-import-export | >= 3.0.0, < 3.88.0>= 4.0.0-canary.0, < 4.0.0-canary.27 |
Weakness: CWE-1321 · Vector: 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