CVE-2026-34750 — Payload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints

CVE-2026-34750

Payload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints PUBLISHED

Description (CNA)

Payload is a free and open source headless content management system. Prior to version 3.78.0 in @payloadcms/storage-azure, @payloadcms/storage-gcs, @payloadcms/storage-r2, and @payloadcms/storage-s3, the client-upload signed-URL endpoints for S3, GCS, Azure, and R2 did not properly sanitize filenames. An attacker could craft filenames to escape the intended storage location. This issue has been patched in version 3.78.0 for @payloadcms/storage-azure, @payloadcms/storage-gcs, @payloadcms/storage-r2, and @payloadcms/storage-s3.

Affected (CNA)

Vendor / product	Versions
payloadcms / payload	affected < 3.78.0

CWE

CWE-22

References

https://github.com/payloadcms/payload/security/advisories/GHSA-frq9-7j6g-v74x

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.