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.

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)

EPSS: 0.003 (26.7th percentile) — read the EPSS interpretation.

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.

Affected products

Payloadcms Payload — versions < 3.78.0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM, 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.