What’s Vulnerable › Vulnerabilities

CVE-2026-105844: Payload: Prototype pollution in Payload Import Export plugin

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-09
• Weakness: CWE-1321

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 products

• payloadcms payload: from 3.0.0, < 3.88.0; from 4.0.0-canary.0, < 4.0.0-canary.27
• @payloadcms plugin-import-export: from 3.0.0, < 3.88.0; from 4.0.0-canary.0, < 4.0.0-canary.27

References

• https://github.com/payloadcms/payload/commit/a742140ab4fca3160f7f83e9e7d996552ffc3b5a
• https://github.com/payloadcms/payload/releases/tag/v3.88.0
• https://github.com/payloadcms/payload/security/advisories/GHSA-qf28-8hc6-vwrp

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