CVE-2026-86858 Unauthenticated Privilege Escalation via GraphQL in ServiceNow AI Platform
Unauthenticated attackers can create, modify, or delete instance data via GraphQL due to improper access control in ServiceNow AI Platform.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86858?
CVE-2026-86858 is a high-severity missing authorization vulnerability in ServiceNow AI Platform, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-284
Which versions are affected by CVE-2026-86858?
How do I fix CVE-2026-86858?
No fix has been published for CVE-2026-86858 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-86858 being exploited?
There is no known exploitation of CVE-2026-86858 in the wild and no public exploit code.
Sources
Also known as GHSA-g4fh-c3m5-g3pg.