CVE-2026-105868

Payload: Uploaded XML files could execute same-origin JavaScript

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, local upload configurations that accept XML files can store an XML file and stylesheet that execute JavaScript in the Payload origin when a logged-in user opens the file. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

Affected

payloadcms · payload

CVSS v4.0 GITHUB

8.6 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/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

CVSS v4.0 GitHub

8.6 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS v3.1 NVD

7.1 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

EPSS

0.17% chance of exploitation in the next 30 days, 6th percentile

Published

2026-10-06

Updated

2026-10-09

Proof-of-concept exploits (2)

• payloadcms/payload/security/advisories/GHSA-9qpg-3cf8-w33x
• payloadcms/payload/releases/tag/v3.90.045286★ · 2026-10-16

Security advisories

• advisories/GHSA-9qpg-3cf8-w33x

References

• CVE Record
• NVD entry

Related

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