Payload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| payloadcms | payload | before 3.78.0 | 3.78.0 | Patch available | CNA |
| — | @payloadcms/storage-azure (npm) | before 3.78.0 | 3.78.0 | Patch available | GHSA-frq9-7j6g-v74x |
| — | @payloadcms/storage-gcs (npm) | before 3.78.0 | 3.78.0 | Patch available | GHSA-frq9-7j6g-v74x |
| — | @payloadcms/storage-r2 (npm) | before 3.78.0 | 3.78.0 | Patch available | GHSA-frq9-7j6g-v74x |
| — | @payloadcms/storage-s3 (npm) | before 3.78.0 | 3.78.0 | Patch available | GHSA-frq9-7j6g-v74x |
- payload Vendorpayloadcms Affected before 3.78.0 Fixed in 3.78.0 Patch available CNA
- @payloadcms/storage-azure (npm) Vendor— Affected before 3.78.0 Fixed in 3.78.0 Patch available GHSA-frq9-7j6g-v74x
- @payloadcms/storage-gcs (npm) Vendor— Affected before 3.78.0 Fixed in 3.78.0 Patch available GHSA-frq9-7j6g-v74x
- @payloadcms/storage-r2 (npm) Vendor— Affected before 3.78.0 Fixed in 3.78.0 Patch available GHSA-frq9-7j6g-v74x
- @payloadcms/storage-s3 (npm) Vendor— Affected before 3.78.0 Fixed in 3.78.0 Patch available GHSA-frq9-7j6g-v74x
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:payloadcms:payload:*:*:*:*:*:node.js:*:* | before 3.78.0 | Vulnerable | payloadcms |
- cpe:2.3:a:payloadcms:payload:*:*:*:*:*:node.js:*:* Versions before 3.78.0 Vulnerable ·payloadcms
Remediation
- Fix · CNA payload (payloadcms) Fixed in 3.78.0
- Fix · GHSA-frq9-7j6g-v74x @payloadcms/storage-azure (npm) Fixed in 3.78.0 Advisory →
- Fix · GHSA-frq9-7j6g-v74x @payloadcms/storage-gcs (npm) Fixed in 3.78.0 Advisory →
- Fix · GHSA-frq9-7j6g-v74x @payloadcms/storage-r2 (npm) Fixed in 3.78.0 Advisory →
- Fix · GHSA-frq9-7j6g-v74x @payloadcms/storage-s3 (npm) Fixed in 3.78.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-34750
- 2026-10-03 Alias added: GHSA-frq9-7j6g-v74x
References
More payloadcms Payload vulnerabilities
- TI-2026-20653 Payload has an SQL Injection in JSON/RichText Queries on PostgreSQL/SQLite Adapters CVSS 3.1CRITICAL 9.8
- TI-2026-68608 Payload CMS lets attackers update collection documents CVSS 3.1CRITICAL 9.8
- TI-2026-68606 Remote code execution in Payload Form Builder plugin CVSS 3.1CRITICAL 10.0
- TI-2026-68612 Payload authentication token field handling issue CVSS 4.0CRITICAL 9.2
- TI-2026-26995 Payload has Unvalidated Input in Password Recovery Endpoints CVSS 3.1CRITICAL 9.1
- TI-2026-68489 Field access control bypass in Payload duplicate operation CVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-34750 · CVE Program
- CVE-2026-34750 · NVD
- FIRST EPSS
- GHSA-frq9-7j6g-v74x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences