Path Traversal in Payloadcms Payload
CVE-2026-34750
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Payloadcms Payload — versions < 3.78.0
Weakness classification (CWE)
References
- github.com/payloadcms/payload/security/advisories/GHSA-frq9-7j6g-v74x (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-34750?
- CVE-2026-34750 is a medium-severity vulnerability in Payloadcms Payload, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-04-01.
- How severe is CVE-2026-34750?
- Medium severity. CVSS v3 base score is 6.5 out of 10.