CVE-2026-34750CWE-22

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

Medium · published April 1, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
34.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00409 · 34.1th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-04-01T19:51Z
EPSS history
Timeline
  • 01 APR 19:51Z
    Payload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints
    cvelistv5