ServiceNow is widely used enterprise SaaS; an unauthenticated auth bypass in its AI Platform can expose sensitive data across many organizations.
CVE-2026-86859
Auth bypass in ServiceNow AI Platform allows unauthenticated data access.
Is CVE-2026-86859 being exploited?
Not confirmed. CVE-2026-86859 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-86859?
CVE-2026-86859 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-86859?
Yes. A fix has been recorded for CVE-2026-86859. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-86859 affect?
CVE-2026-86859 affects ServiceNow AI Platform, Hosted ServiceNow instances, Self-hosted ServiceNow instances/partners. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-86859?
Apply ServiceNow security update immediately; review access logs and privileges.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can bypass authorization to read restricted AI Platform data, enabling data exfiltration and potential lateral escalation.
Immediate action required
- affected< Yokohama Patch 13 Hot Fix 5a
- affected< Zurich Patch 10 Hot Fix 3b
- affected< Zurich Patch 10 Hot Fix 4a W32
- affected< Zurich Patch 11 Hot Fix 3
- affected< Australia Patch 2 Hot Fix 4b W32
- affected< Australia Patch 4 Hot Fix 3
- affected< Australia Patch 5
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.