Medium, CVSS 6.5npmAmendedPublished
Payload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints
CVE-2026-34750 · GHSA-frq9-7j6g-v74x
- Affected
- npm @payloadcms/storage-azure < 3.78.0
- Fixed in
- 3.78.0· Vendor fix available
- Issue
- Impact 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. Consumers are affected if ALL of these are true: - Payload version < v3.78.0 - Using client-upload signed-URL endpoints for any supported storage adapter Patches This vulnerability has been patched in v3.78.0. Filename validation has been hardened for client uploads. Consumers should upgrade to v3.78.0 or later. Workarounds Consumers can upgrade: - Limit access to client-upload signed-URL endpoints to trusted users only.
Recommended action: Upgrade to 3.78.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.