CVE-2026-75156Network attack vector

Unauthenticated access via cross-tenant Azure tokens

Published Sep 8, 2026 · Updated Sep 8, 2026

Authentication bypass in Apache Airflow FAB provider 3.7.3 through 3.8.0 allows remote attackers to access the Airflow UI via Azure AD OAuth. The Azure OAuth handler verifies id_token signatures with Microsoft's multi-tenant JWKS but accepts the issuer, audience, username, and roles without binding them to the configured tenant or application. The path is reachable only when Azure AD OAuth is configured, and a token from any attacker-controlled Azure tenant can establish an Airflow identity with token-supplied roles.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Apache Airflow FAB provider 3.7.3 through 3.8.0 allows remote attackers to access the Airflow UI via Azure AD OAuth. The Azure OAuth handler verifies id_token signatures with Microsoft's multi-tenant JWKS but accepts the issuer, audience, username, and roles without binding them to the configured tenant or application. The path is reachable only when Azure AD OAuth is configured, and a token from any attacker-controlled Azure tenant can establish an Airflow identity with token-supplied roles.

The record

CVE
CVE-2026-75156
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
The Apache Software Foundation
Product
Apache Airflow FAB provider
Classifications
T1078.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=3.7.3 <3.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Airflow FAB providerversion=3.7.3 <3.8.1

Published CVSS scores

No CVSS assessment is available in this record.

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1078.004Valid Accounts: Cloud Accounts

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

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Your stack

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