CVE-2026-34750

[CVE catalog]

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.

Severity

Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Published

Apr 1, 2026, 8:16:27 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.34% · Oct 27, 2026

{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "payload",
      "ecosystem": "cpe",
      "fixed_version": "3.78.0"
    },
    {
      "name": "payload",
      "ranges": [
        {
          "fixed": "3.78.0",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "3.78.0",
      "provider_record_id": "NVD-CVE-2026-34750"
    }
  ]
}