Advisoriesby IbisServiceNowCVE-2026-86858
ServiceNow AI Platform: improper access control
Fix: upgrade to Yokohama Patch 13 Hot Fix 5a or later (4 fixed versions below)
ServiceNow has remediated an improper access control security issue that was identified in the ServiceNow AI Platform. This security issue could enable an unauthenticated user, in certain circumstances, to create, modify, or delete instance data beyond what was intended.
In August 2026, ServiceNow deployed a security update to hosted instances and ServiceNow provided the update to our partners and self-hosted customers. We are not currently aware of malicious exploitation against ServiceNow instances. We recommend customers promptly apply appropriate updates or upgrade to a patched release if they have not already done so.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| ServiceNow AI Platform Product | < Yokohama Patch 13 Hot Fix 5a | Yokohama Patch 13 Hot Fix 5a |
| < Zurich Patch 10 Hot Fix 3b | Zurich Patch 10 Hot Fix 3b | |
| < Zurich Patch 10 Hot Fix 4a W32 | Zurich Patch 10 Hot Fix 4a W32 | |
| < Zurich Patch 11 Hot Fix 3 | Zurich Patch 11 Hot Fix 3 |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-284