CVE-2026-105867

high

Description

Payload is a free and open source headless content management system. In @payloadcms/storage-s3 versions before 3.90.0 and canary versions before 4.0.0-canary.34, an authenticated user can overwrite an existing S3 object belonging to another upload collection when client uploads are enabled for multiple collections sharing a bucket and useCompositePrefixes is false or unset. This bypasses the target collection's access controls and prior file validation. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

References

https://github.com/payloadcms/payload/security/advisories/GHSA-7vg8-29qx-jgj8

https://github.com/payloadcms/payload/releases/tag/v3.90.0

https://github.com/payloadcms/payload/commit/2df8238fbf17edfce335c399b90bf524ba9906a2

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-93513

Details

Source: Mitre, NVD

Published: 2026-10-06

Updated: 2026-10-06

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Severity: High

CVSS v4

Base Score: 7.1

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00253