CVE-2026-18886 PUBLISHED

Unauthenticated Privilege Escalation via System Configuration Image Upload Processor

Assigner: SN
Reserved: 04.08.2026 Published: 27.08.2026 Updated: 27.08.2026

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.

Metrics

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
CVSS Score: 10

Product Status

Vendor ServiceNow
Product ServiceNow AI Platform
Versions Default: unaffected
  • affected from 0 to Xanadu Patch 11 Hot Fix 7a (excl.)
  • affected from 0 to Yokohama Patch 12 Hot Fix 3b (excl.)
  • affected from 0 to Yokohama Patch 13 Hot Fix 4 (excl.)
  • affected from 0 to Zurich Patch 7b Hot Fix 3 (excl.)
  • affected from 0 to Zurich Patch 8 Hot Fix 5 (excl.)
  • affected from 0 to Zurich Patch 9 Hot Fix 6 (excl.)
  • affected from 0 to Zurich Patch 10 Hot Fix 2m (m-branch) (excl.)
  • affected from 0 to Zurich Patch 10 Hot Fix 3 (standard) (excl.)
  • affected from 0 to Zurich Patch 11 (excl.)
  • affected from 0 to Zurich Patch 12 (excl.)
  • affected from 0 to Australia Patch 2 Hot Fix 3 (excl.)
  • affected from 0 to Australia Patch 3 Hot Fix 2 (excl.)
  • affected from 0 to Australia Patch 3m (excl.)
  • affected from 0 to Australia Patch 4 (excl.)
  • unknown from 0 to Australia Patch 5 (excl.)

Credits

  • Kevin Gervot - Assetnote finder

References