File Sanitation Flaw in Payload CMS Affecting Azure, GCS, R2, and S3 Storage
CVE-2026-34750

6.5MEDIUM

Key Information:

Vendor

Payloadcms

Status
Payload
Vendor
CVE Published:
1 April 2026

What is CVE-2026-34750?

The Payload CMS is susceptible to a file sanitation vulnerability in its client-upload signed-URL endpoints for storage solutions, including Azure, GCS, R2, and S3. Prior to version 3.78.0, the application failed to adequately sanitize filenames, enabling potential attackers to manipulate file paths and escape designated storage directories. This flaw could lead to unauthorized access or exposure of files, emphasizing the importance of upgrading to version 3.78.0 or later for enhanced security. Users are encouraged to review their storage settings and ensure they comply with best security practices.

Affected Version(s)

payload < 3.78.0

References

https://github.com/payloadcms/payload/security/advisories...
x_refsource_CONFIRM

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.