CVE-2026-86858
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Improper Access Control in ServiceNow AI Platform

Publication date: 2026-09-24

Last updated on: 2026-09-24

Assigner: ServiceNow

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.

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Meta Information

Published
2026-09-24
Last Modified
2026-09-24
Generated
2026-09-25
AI Q&A
2026-09-24
EPSS Evaluated
N/A
NVD
CVE-2026-86858
EUVD
EUVD-2026-86395

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is an improper access control issue in the ServiceNow AI Platform. It allows an unauthenticated user, under certain conditions, to create, modify, or delete instance data beyond intended limits.

Impact Analysis

An attacker could manipulate data without authentication, potentially leading to unauthorized changes in instance data such as records, configurations, or settings.

Compliance Impact

The vulnerability could allow unauthorized modification or deletion of instance data, which may impact compliance with standards requiring data integrity and access controls, such as GDPR and HIPAA. Unauthorized changes to sensitive data could violate regulatory requirements for data protection and confidentiality.

Mitigation Strategies

Apply the security update deployed by ServiceNow in August 2026 to all instances. If using self-hosted or partner solutions, upgrade to the patched release immediately. Verify the update is applied to prevent unauthorized data modifications.

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