CVE-2026-86858

Unauthenticated Privilege Escalation via GraphQL in ServiceNow AI Platform

State: Published
Severity: 8.7 High
Published: Sep 24, 2026
Updated: Sep 24, 2026
Reserved: Sep 8, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	SN

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
ServiceNow AI PlatformServiceNow	before Yokohama Patch 13 Hot Fix 5aAffected before Zurich Patch 10 Hot Fix 3bAffected before Zurich Patch 10 Hot Fix 4a W32Affected before Zurich Patch 11 Hot Fix 3Affected before Australia Patch 2 Hot Fix 4b W32Affected before Australia Patch 4 Hot Fix 3Affected before Australia Patch 5Affected

References

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB3159623

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