CVE-2026-18886

CVE Enrichment

CVSS: 10.0 CRITICAL
EPSS: 5.04%
EPSS Percentile: 92.26%
CISA KEV: Not listed

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.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: [email protected]
Published: 28-Aug-2026 03:17
Last Modified: 03-Sep-2026 20:04
EPSS Date: 2026-10-22
CWE: CWE-284

CVSS Vector


            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 /
                            E:X /
                            CR:X /
                            IR:X /
                            AR:X /
                            MAV:X /
                            MAC:X /
                            MAT:X /
                            MPR:X /
                            MUI:X /
                            MVC:X /
                            MVI:X /
                            MVA:X /
                            MSC:X /
                            MSI:X /
                            MSA:X /
                            S:X /
                            AU:X /
                            R:X /
                            V:X /
                            RE:X /
                            U:X

References

[email protected]

Last enrichment sync: 02-Nov-2026 06:49
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (2)

The second critical defect, CVE-2026-18886, is described as an improper access control issue. ServiceNow Patches Four Vulnerabilities, Including Three Critical Flaws
#ServiceNow ServiceNow Patches Three Critical AI Platform Vulnerabilities

CVE (7)

People (1)

MITRE ATT&CK (1)

Vendors (1)

Products (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.