Payload: Incomplete validation during the upload file lifecycle

## Impact Under certain conditions, an authenticated user with permission to modify uploads could cause unintended files to be removed during file cleanup. This may result in data loss or service disruption. You are affected if: - You use Payload upload collections with local file storage. - Untrusted authenticated users can update or delete uploads. Deployments that restrict upload management to trusted users are less exposed. ## Patches Payload now validates uploaded filenames and ensures file cleanup remains within the configured upload directory. Users should upgrade Payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`. ## Workarounds Restrict upload update and deletion operations to trusted users and validate submitted filenames. These measures are temporary mitigations. Upgrading to a patched version is recommended.

Source published

7 Oct 2026 20:29:09 UTC

Source modified

7 Oct 2026 20:45:06 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Publisher rating · HIGH