Exploit discussion active in current signal (1 latest mentions)
Recommended action window: High priority (within 72h)
NVD description
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.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-03-11 | 4 | Disclosure4 |
| 2026-03-12 | 1 | Disclosure1 |
CVE-2026-31957 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 dom… https://www.cve.org/CVERecord?id=CVE-2026-31957
Post summary
The text announces CVE-2026-31957 affecting Himmelblau 3.0.0 to before 3.1.0, highlighting a missing tenant domain configuration issue and linking to the CVE record for details.
ヒンメルブラウは青空？ EntraとIntuneに関連するシステムっぽいが、、、 ■Himmelblau脆弱性 https://nvd.nist.gov/vuln/detail/CVE-2026-31957 ■Unset domain configuration can allow any-tenant authentication at first login for remote deployments https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-q746-m2wv-qh4v
Post summary
The post introduces CVE‑2026‑31957, noting an authentication bypass due to unset domain configuration, but offers no PoC, exploit code, active exploitation evidence, or patch details.
🚨*CVE* CVE-2026-31957 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 dom… https://www.cve.org/CVERecord?id=CVE-2026-31957 ----- Traducción: CVE-2026-31957 Him… http://infoflow.cloud`
Post summary
The message announces CVE-2026-31957 for the Himmelblau interoperability suite on Azure Entra ID/Intune, noting affected versions and a missing tenant domain configuration, without any PoC, exploit, or patch details.
[CVE-2026-31957: CRITICAL] Attention to users of Himmelblau on Microsoft Azure Entra ID and Intune! A critical vulnerability from version 3.0.0 to 3.1.0 has been fixed to enhance tenant-scoped authentication.#cve,CVE-2026-31957,#cybersecurity https://cvefind.com/CVE-2026-31957
Post summary
The message alerts that CVE-2026-31957, a critical vulnerability affecting Himmelblau on Azure Entra ID and Intune, has been fixed in version 3.1.0, with no proof‑of‑concept or exploitation details provided.
🚨 CVE-2026-31957: Himmelbla... Misconfigured Himmelblau accepts auth from ANY Azure tenant—perfect for initial access via tenant confusion attacks. #AzureAD #TenantTakeover. https://zerodaysignal.com/vulnerability/CVE-2026-31957 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
CVE‑2026‑31957 is highlighted as a misconfigured Himmelblau that allows authentication from any Azure tenant, enabling tenant confusion attacks. The post announces the vulnerability but does not include exploit code or remediation details.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | himmelblau-idm | himmelblau | - | - | - |