Unauthenticated Privilege Escalation via System Configuration Image Upload Processor (CVE-2026-18886) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-18886

Unauthenticated Privilege Escalation via System Configuration Image Upload Processor

Answer in brief

CVE-2026-18886 records a Unknown severity vulnerability in Unauthenticated Privilege Escalation via System Configuration Image Upload Processor. 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 Aug 27, 2026Updated Aug 27, 2026Source checked Aug 27, 2026First seen by HOL Aug 27, 2026Material review Aug 27, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 <Xanadu Patch 11 Hot Fix 7a \|\| >=0 <Yokohama Patch 12 Hot Fix 3b \|\| >=0 <Yokohama Patch 13 Hot Fix 4 \|\| >=0 <Zurich Patch 7b Hot Fix 3 \|\| >=0 <Zurich Patch 8 Hot Fix 5 \|\| >=0 <Zurich Patch 9 Hot Fix 6 \|\| >=0 <Zurich Patch 10 Hot Fix 2m (m-branch) \|\| >=0 <Zurich Patch 10 Hot Fix 3 (standard) \|\| >=0 <Zurich Patch 11 \|\| >=0 <Zurich Patch 12 \|\| >=0 <Australia Patch 2 Hot Fix 3 \|\| >=0 <Australia Patch 3 Hot Fix 2 \|\| >=0 <Australia Patch 3m \|\| >=0 <Australia Patch 4	Xanadu Patch 11 Hot Fix 7a, Yokohama Patch 12 Hot Fix 3b, Yokohama Patch 13 Hot Fix 4, Zurich Patch 7b Hot Fix 3, Zurich Patch 8 Hot Fix 5, Zurich Patch 9 Hot Fix 6, Zurich Patch 10 Hot Fix 2m (m-branch), Zurich Patch 10 Hot Fix 3 (standard), Zurich Patch 11, Zurich Patch 12, Australia Patch 2 Hot Fix 3, Australia Patch 3 Hot Fix 2, Australia Patch 3m, Australia Patch 4

Recommended response

Check inventory. Check lockfiles and deployed manifests for ServiceNow/ServiceNow AI Platform.
Review the reported fix. Update ServiceNow/ServiceNow AI Platform to Xanadu Patch 11 Hot Fix 7a if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 27, 2026

Sources and claim methodology

Source referencesupport.servicenow.com

Upstream source description

ServiceNow has remediated an improper access control vulnerability that was identified in the ServiceNow AI platform. This vulnerability could enable an unauthenticated user, in certain circumstances, to create or modify instance data beyond what was intended, resulting in privilege escalation. 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 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.