CVE-2026-93363 json
Payload CMS storage-vercel-blob Adapter Improper Access Control on Upload Route
published last mo. modified 7d ago also EUVD-2026-87206 , GHSA-mc8m-rr6c-r5qr
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 7%
- public exploits
- 0
- none known
Summary
The @payloadcms/storage-vercel-blob storage adapter for Payload contains an improper access control vulnerability that allows authenticated users to bypass collection-level permissions by accessing the client-upload route directly. Attackers can upload files through the client-upload endpoint without possessing the required collection access permissions, circumventing the intended access control enforcement.
Patch / fix
- npm @payloadcms/storage-vercel-blob 3.90.0, 4.0.0-canary.34
- payloadcms payload 3.90.0, 4.0.0-canary.34
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last mo.
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @payloadcms/storage-vercel-blob | >=3.25.0, <3.90.0 >=4.0.0-canary.0, <4.0.0-canary.34 |
3.90.0 4.0.0-canary.34 |
Affected products
- payloadcms payload
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/payloadcms/payload/commit/47abe9bb5c444330dbfaa9a5bc2033337932270b
web
-
github.com
/payloadcms/payload/security/advisories/GHSA-mc8m-rr6c-r5qr
vendor-advisory, web, advisory
-
vulncheck.com
/advisories/payload-cms-storage-vercel-blob-adapter-improper-access-control-on-upload-route
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-93363
advisory
-
github.com
/payloadcms/payload
package
-
github.com
/payloadcms/payload/releases/tag/v3.90.0
web
Sources
- CVE List CVE-2026-93363
- GitHub Advisory GHSA-mc8m-rr6c-r5qr
- NVD CVE-2026-93363
- Maintainer advisory GHSA-mc8m-rr6c-r5qr
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of payloadcms/payload published their own advisory on GitHub. Reviewed sources take precedence over it.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.