ServiceNow is a widely used enterprise ITSM platform; an authorization bypass in its AI Platform can expose organizational data across customers, making it broadly impactful and newsworthy.
CVE-2026-86857
Authorization bypass in ServiceNow AI Platform allows authenticated users to access unauthorized data.
Is CVE-2026-86857 being exploited?
Not confirmed. CVE-2026-86857 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. EPSS currently estimates a 0.25% probability of exploitation in the next 30 days.
How severe is CVE-2026-86857?
CVE-2026-86857 is rated High with a CVSS score of 8.4. 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-2026-86857?
Yes. A fix has been recorded for CVE-2026-86857. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-86857 affect?
CVE-2026-86857 affects ServiceNow AI Platform, ServiceNow hosted instances, Self-hosted ServiceNow (on-prem). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-86857?
Apply ServiceNow's security update immediately and verify instances are patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated users can bypass authorization to read/exfiltrate data in the ServiceNow AI Platform, possibly enabling further privilege abuse or data leakage.
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.
cisa ssvc
- exploitation
- none
- automatable
- no
- technical impact
- partial
Assessed by CISA 24 Sept 2026 (SSVC 2.0.3).
timeline
- 24 Sept 2026Published
- 24 Sept 2026CISA SSVC assessment: exploitation none · same day later
- 25 Sept 2026Analysed by vulneraibility.com · 1 day later
- 25 Sept 2026CVE record last updated · same day later
- Linksupport.servicenow.com /kb?id=kb_article_view&sysparm_article=KB3159623
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.