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Vulnerability · Published Sep 24, 2026 · Assigned by SN

CVE-2026-86858Unauthenticated Privilege Escalation via GraphQL in ServiceNow AI Platform

High 8.7

In plain English

A high-severity improper access control in ServiceNow AI Platform from ServiceNow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.3%top 79.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 products (as reported)

VendorProductVersions
ServiceNow ServiceNow AI Platform 0 – before Yokohama Patch 13 Hot Fix 5a0 – before Zurich Patch 10 Hot Fix 3b0 – before Zurich Patch 10 Hot Fix 4a W320 – before Zurich Patch 11 Hot Fix 30 – before Australia Patch 2 Hot Fix 4b W320 – before Australia Patch 4 Hot Fix 30 – before Australia Patch 5

Weakness: CWE-284 · Vector: 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

References