Skip to main content

Azure CVE-2026-31957

CRITICAL
Initialization of a Resource with an Insecure Default (CWE-1188)
2026-03-11 security-advisories@github.com
Azure
10.0
CVSS 3.1 · GitHub Advisory
Share

Severity by source

GitHub Advisory PRIMARY
10.0 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:07 vuln.today
CVE Published
Mar 11, 2026 - 20:16 nvd
CRITICAL 10.0

DescriptionGitHub Advisory

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. From 3.0.0 to before 3.1.0, if Himmelblau is deployed without a configured tenant domain in himmelblau.conf, authentication is not tenant-scoped. In this mode, Himmelblau can accept authentication attempts for arbitrary Entra ID domains by dynamically registering providers at runtime. This behavior is intended for initial/local bootstrap scenarios, but it can create risk in remote authentication environments. This vulnerability is fixed in 3.1.0.

AnalysisAI

Default password in Himmelblau Azure Entra ID suite 3.0.0-3.0.x. CVSS 10.0.

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Discover Himmelblau instance without tenant domain
Delivery
Send authentication request for arbitrary Entra ID domain
Exploit
Himmelblau dynamically registers provider
Execution
Attacker authenticates as unintended tenant user
Impact
Gain access to Azure Entra ID resources
Sign in to reveal

Vulnerability AssessmentAI

Exploitation Himmelblau versions 3.0.0 to 3.0.x deployed with no configured tenant domain in himmelblau.conf file. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 10.0. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Login with default password to Azure Entra ID integration.
Remediation Update to 3.1.0. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours: Identify all systems running Himmelblau 3.0.0-3.1.0 and assess exposure; establish incident response protocols. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

Share

CVE-2026-31957 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy