What’s Vulnerable › Vulnerabilities
CVE-2026-18886: Unauthenticated Privilege Escalation via System Configuration Image Upload Processor
- Severity: critical (CVSS 10.0 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 5.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-27 · updated 2026-09-03
- Weakness: CWE-284
Description
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 products
- ServiceNow AI Platform: before Xanadu Patch 11 Hot Fix 7a; before Yokohama Patch 12 Hot Fix 3b; before Yokohama Patch 13 Hot Fix 4; before Zurich Patch 7b Hot Fix 3; before Zurich Patch 8 Hot Fix 5; before Zurich Patch 9 Hot Fix 6 — fixed in Australia Patch 2 Hot Fix 3, Australia Patch 3 Hot Fix 2, Australia Patch 3m, Australia Patch 4, Australia Patch 5, Xanadu Patch 11 Hot Fix 7a
How to fix
Upgrade to a fixed version: ServiceNow AI Platform Australia Patch 2 Hot Fix 3, Australia Patch 3 Hot Fix 2, Australia Patch 3m, Australia Patch 4. Check the vendor advisory for mitigations.
References
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