High severity · published Sep 24, 2026
CVE-2026-86858
Unauthenticated Privilege Escalation via GraphQL in ServiceNow AI Platform
8.7
CVSS
0.3%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SA
ServiceNow AI Platform · ServiceNow
before Yokohama Patch 13 Hot Fix 5a; before Zurich Patch 10 Hot Fix 3b; before Zurich Patch 10 Hot Fix 4a W32; before Zurich Patch 11 Hot Fix 3; before Australia Patch 2 Hot Fix 4b W32; before Australia Patch 4 Hot Fix 3; +1 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86858
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86858
support.servicenow.com
https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB3159623
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