ServiceNowCVE-2026-18886
ServiceNow AI Platform: improper access control
Critical10.0CVE-2026-18886 · Published Aug 27, 2026 · updated Sep 3, 2026
ServiceNow has remediated an improper access control vulnerability that was identified in the ServiceNow AI platform. This vulnerability could enable an unauthenticated user, in certain circumstances, to create or modify instance data beyond what was intended, resulting in privilege escalation. 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 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 | < Xanadu Patch 11 Hot Fix 7a | Xanadu Patch 11 Hot Fix 7a |
| < Yokohama Patch 12 Hot Fix 3b | Yokohama Patch 12 Hot Fix 3b | |
| < Yokohama Patch 13 Hot Fix 4 | Yokohama Patch 13 Hot Fix 4 | |
| < Zurich Patch 7b Hot Fix 3 | Zurich Patch 7b Hot Fix 3 |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
More ServiceNow advisories
All ServiceNow| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 24 | ServiceNow AI Platform: missing authorization | Critical9.3 | Yokohama Patch 13 Hot Fix 5a+3 more |
| Sep 24 | ServiceNow AI Platform: unauthenticated user could access data within | High8.7 | Yokohama Patch 13 Hot Fix 5a+3 more |
| Sep 24 | ServiceNow AI Platform: SQL injection | Critical9.3 | Yokohama Patch 13 Hot Fix 5a+3 more |
| Aug 27 | ServiceNow AI Platform: SQL injection | Critical10.0 | Xanadu Patch 11 Hot Fix 7a+3 more |
| Aug 27 | ServiceNow AI Platform: remote code execution | Critical10.0 | Xanadu Patch 11 Hot Fix 7a+3 more |
| Aug 27 | ServiceNow AI Platform: code injection | Critical10.0 | Xanadu Patch 11 Hot Fix 7a+3 more |