CVE-2026-86858CWE-284broken-access-control

CVE-2026-86858

published September 24, 2026

CVSS
8.7
EPSS
0%
Percentile
18.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
8.7 · NONE
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00273 · 18.7th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-09-24T23:17Z
References (1)
EPSS history
Timeline
  • 26 SEP 03:27Z
    EPSS moved — → 0%
    epss
  • 24 SEP 18:42Z
    Unauthenticated Privilege Escalation via GraphQL in ServiceNow AI Platform
    cvelistv5