CVE record · CVE-2026-18886

Unauthenticated Privilege Escalation via System Configuration Image Upload Processor

CVSS 10.0 CriticalCriticalEPSS 0.050 · 92nd percentile

Critical, because:

CVSS score 10.0: 9.0 or more.

Published by the CVE Program (CNA: SN) at 27 Aug 2026, 19:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
ServiceNow	ServiceNow AI Platform	affected before Xanadu Patch 11 Hot Fix 7a custom affected before Yokohama Patch 12 Hot Fix 3b custom affected before Yokohama Patch 13 Hot Fix 4 custom affected before Zurich Patch 7b Hot Fix 3 custom affected before Zurich Patch 8 Hot Fix 5 custom affected before Zurich Patch 9 Hot Fix 6 customZurich Patch 10 Hot Fix 2m (m-branch) affected before Zurich Patch 10 Hot Fix 2m (m-branch) custom affected before Zurich Patch 10 Hot Fix 3 (standard) custom affected before Zurich Patch 11 custom affected before Zurich Patch 12 custom affected before Australia Patch 2 Hot Fix 3 custom affected before Australia Patch 3 Hot Fix 2 custom and 3 more Other versions: unaffected

Identifiers: CVE-2026-18886
CNA: SN
Weakness (CWE): CWE-284
Tags: ServiceNow AI Platform
Broken access control
Published: 27 Aug 2026
Updated: 2 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
10.0	Critical	4.0	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 (SN)

CISA KEV Not listed.
EPSS 0.050, the 92nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 27 Aug 2026. New records show when each source confirmed them.

Sources

References from the CNA

support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB3152242

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.