CVE-2026-105860
Payload: Tenant authorization bypass in Multi-Tenant Plugin
No exploitation reported by the sources we read.
- Published2026-10-06
- Fixed in3.90.0
- WeaknessCWE-862
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Payload is a free and open source headless content management system. In @payloadcms/plugin-multi-tenant versions before 3.90.0 and canary versions before 4.0.0-canary.34, the default tenant array field access allows an authenticated user to assign the user's own account to other tenants. Deployments that replace the default behavior with secured tenants arrayFieldAccess.create and tenants arrayFieldAccess.update functions are not affected by this behavior. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
Timeline
dates in UTC- 2026-10-0617:17CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-105860?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-105860?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 3.90 | < 3.90.0 | 3.90.0 | NVD |
| 4.0 | = 4.0.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.0 | ≥ 4.0.0-canary.0, < 4.0.0-canary.34 | 4.0.0-canary.34 | OSV |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Payloadcms payload to 3.90.0
Advisories and patches
- github.comPatch
- github.comPatch · Release Notes
- github.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
- CVSS 4.0 vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/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
- Published
- 2026-10-06
- Last Modified
- 2026-10-15
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2026-105860?
Is CVE-2026-105860 actively exploited?
What is the CVSS score for CVE-2026-105860?
Running @payloadcms/plugin-multi-tenant? Hear about its next vulnerability
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Same product first, then the same vendor advisory and the same publication week.
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