CVE-2026-69857Network attack vector

Authenticated spoofing via user-controlled authorization key

Published Sep 3, 2026 · Updated Sep 4, 2026

Authorization bypass in Microsoft Azure Cosmos DB allows remote authenticated users to spoof identities through a user-controlled key. Microsoft has not disclosed which Cosmos DB API or authorization check accepts the user-controlled key without verifying the caller's entitlement. A valid low-privilege credential and high-complexity conditions are required; the disclosed consequence is network-reachable spoofing, while the affected data or identity boundary remains undisclosed.

CVSS severity8.5
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authorization bypass in Microsoft Azure Cosmos DB allows remote authenticated users to spoof identities through a user-controlled key. Microsoft has not disclosed which Cosmos DB API or authorization check accepts the user-controlled key without verifying the caller's entitlement. A valid low-privilege credential and high-complexity conditions are required; the disclosed consequence is network-reachable spoofing, while the affected data or identity boundary remains undisclosed.

The record

CVE
CVE-2026-69857
Published
Sep 3, 2026
Updated
Sep 4, 2026
Vendor
Microsoft
Product
Azure Cosmos DB
Classifications
CWE-639, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=-

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Azure Cosmos DBversion=-

Published CVSS scores

8.5MicrosoftCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo