CVE-2026-76187Network attack vectorHinoki check available

Unauthorized session issuance via unrestricted realm clients

Published Sep 16, 2026 · Updated Sep 16, 2026

Authentication bypass in Apache Airflow Keycloak provider before 0.10.0 allows remote authenticated users to obtain Airflow session tokens. The create_client_credentials_token service builds a Keycloak client from caller-supplied identifiers and mints a signed Airflow JWT without restricting the client ID. Exploitation requires valid credentials for another confidential client in the same realm; access is limited to that service account's permissions and authenticated-only endpoints.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in Apache Airflow Keycloak provider before 0.10.0 allows remote authenticated users to obtain Airflow session tokens. The create_client_credentials_token service builds a Keycloak client from caller-supplied identifiers and mints a signed Airflow JWT without restricting the client ID. Exploitation requires valid credentials for another confidential client in the same realm; access is limited to that service account's permissions and authenticated-only endpoints.

The record

CVE
CVE-2026-76187
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
Apache Software Foundation
Product
Apache Airflow Keycloak provider
Classifications
T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=0 <0.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Apache Software Foundation · Apache Airflow Keycloak providerversion=0 <0.10.0

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1078Valid 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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