CVE-2026-18886 json
Unauthenticated Privilege Escalation via System Configuration Image Upload Processor
published 2026-08-27 2 mo ago modified 2026-09-03 2 mo ago also EUVD-2026-67220
- cvss
- 10.0
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.0%
- EPSS 5.0% chance of exploitation in 30 days, percentile 92%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- ServiceNow ServiceNow AI Platform Australia Patch 2 Hot Fix 3, Australia Patch 3 Hot Fix 2, Australia Patch 3m, Australia Patch 4, Australia Patch 5, Xanadu Patch 11 Hot Fix 7a, Yokohama Patch 12 Hot Fix 3b, Yokohama Patch 13 Hot Fix 4, Zurich Patch 7b Hot Fix 3, Zurich Patch 8 Hot Fix 5, Zurich Patch 9 Hot Fix 6, Zurich Patch 10 Hot Fix 2m (m-branch), Zurich Patch 10 Hot Fix 3 (standard), Zurich Patch 11, Zurich Patch 12
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
5.04% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 10.0 | 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 |
| CNA | 4.0 | 10.0 | 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 |
Affected products
- ServiceNow ServiceNow AI Platform
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
Sources
- CVE List CVE-2026-18886
- NVD CVE-2026-18886
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