# CVE-2026-85889: Microsoft Azure AI Foundry missing authentication for critical function

Source: https://junglewise.ai/threats/cve-2026-85889-missing-authentication-for-critical-function-in-azure-ai-foundry  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-17. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-85889 · Severity: critical · CVSS 10 · Published 2026-09-17

Azure AI Foundry, Microsoft's platform for building and deploying AI applications, contains a missing authentication check in a critical function. An attacker with network access can exploit this to gain unauthorized administrative privileges without credentials, potentially compromising all AI models, data, and applications within the environment.

Technologies: [Microsoft Azure Ai Foundry](https://junglewise.ai/threats/technologies/azure-ai-foundry). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-85889 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-85889 being exploited in the wild.

**How severe is CVE-2026-85889?** Critical severity, with a CVSS score of 10, published 17 September 2026.

**Which products and versions are affected?** Microsoft Azure AI Foundry.

**Is there a fix for CVE-2026-85889?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-85889 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-85889?** Check whether you run Microsoft Azure Ai Foundry. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A critical function in Azure AI Foundry lacks proper authentication checks, allowing unauthenticated network-based privilege escalation. The vulnerability requires only network access and no valid credentials to exploit. Successful exploitation grants full administrative control over the affected AI Foundry instance.

## Affected products

- Microsoft Azure AI Foundry

## Timeline

- 2026-09-17: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85889](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85889)

## Related threats

- [Azure AI Foundry server-side request forgery](https://junglewise.ai/threats/cve-2026-108456-server-side-request-forgery-ssrf-in-azure-ai-foundry-allows-an)
- [Microsoft Azure AI Foundry server-side request forgery](https://junglewise.ai/threats/cve-2026-85917-server-side-request-forgery-ssrf-in-azure-ai-foundry-allows-an)
- [Improper access control in Azure AI Foundry M365 published agents allows an unauthorized attacker to elevate privileges over a network.](https://junglewise.ai/threats/cve-2026-35435-improper-access-control-in-azure-ai-foundry-m365-published-agents)
- [Microsoft Azure AI Foundry privilege escalation](https://junglewise.ai/threats/cve-2026-32213-microsoft-azure-ai-foundry-privilege-escalation)