EUVD Vulnerability Catalog

EUVD-2026-67220

Severity: CRITICAL Base Score: 10 CVSS Version: 4.0

Vulnerability 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.

CVSS Vector Analysis

Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): None
User Interaction (UI): None
Vulnerability Confidentiality Impact (VC): High
Vulnerability Integrity Impact (VI): High
Vulnerability Availability Impact (VA): High
Subsequent Confidentiality Impact (SC): High
Subsequent Integrity Impact (SI): High
Subsequent Availability Impact (SA): High

Affected Vendors & Systems

Vendor Servicenow

References & Advisory Links

Metadata Profile

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

SN

EPSS Probability

0.25

Known Aliases
CVE-2026-18886 GHSA-f8mv-7pgv-hmrg
Published On

2026-08-27

Last Updated

2026-09-02