Unauthenticated Privilege Escalation via GraphQL in ServiceNow AI Platform (CVE-2026-86858) | HOL Guard CVE

High · CVSS 8.7CVE-2026-86858

Unauthenticated Privilege Escalation via GraphQL in ServiceNow AI Platform

Answer in brief

CVE-2026-86858 records a High severity (CVSS 8.7) vulnerability in Unauthenticated Privilege Escalation via GraphQL in ServiceNow AI Platform. The current sources do not mark it as known exploited. The current feed maps ServiceNow/ServiceNow AI Platform (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 24, 2026Updated Sep 24, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.7
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ServiceNow/ServiceNow AI Platform (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
ServiceNow/ServiceNow AI Platformgeneric	>=0 <Yokohama Patch 13 Hot Fix 5a \|\| >=0 <Zurich Patch 10 Hot Fix 3b \|\| >=0 <Zurich Patch 10 Hot Fix 4a W32 \|\| >=0 <Zurich Patch 11 Hot Fix 3 \|\| >=0 <Australia Patch 2 Hot Fix 4b W32 \|\| >=0 <Australia Patch 4 Hot Fix 3 \|\| >=0 <Australia Patch 5	Yokohama Patch 13 Hot Fix 5a, Zurich Patch 10 Hot Fix 3b, Zurich Patch 10 Hot Fix 4a W32, Zurich Patch 11 Hot Fix 3, Australia Patch 2 Hot Fix 4b W32, Australia Patch 4 Hot Fix 3, Australia Patch 5, Yokohama, Zurich, Australia

Recommended response

Check inventory. Check lockfiles and deployed manifests for ServiceNow/ServiceNow AI Platform.
Review the reported fix. Update ServiceNow/ServiceNow AI Platform to Yokohama Patch 13 Hot Fix 5a if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Source referencesupport.servicenow.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.