CVE WatchOct 15, 2026

CVE-2026-105867

Payload is a free and open source headless content management system. In @payloadcms/storage-s3 versions before 3.90.0 and canary versions b

CVSS

6.5

Medium

EPSS

0.2%

p12

KEV

—

Exploit Today

0-100

Published: Oct 6, 2026 · Last modified: Oct 15, 2026 · CWE-639

EPSS · 30d

0.2%EPSS · 30 days0.3%

2026-10-072026-10-21

Technical 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.

Official references

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