CVE-2026-76186

9.1 CRITICALpublic exploit available

Published 2026-09-16 · Updated 2026-09-18

AI risk analysis

Summary: This vulnerability allows an attacker to pair a valid Airflow session token with another user's Keycloak access or refresh tokens, enabling unauthorized access and privilege escalation.
Exploitability: Exploitation requires holding a valid Airflow login and obtaining another user’s Keycloak tokens out of band. The attack is moderately complex due to the need for both credentials.
Blast radius: If exploited, this can lead to significant data breaches or unauthorized actions within the affected Airflow deployment, impacting multiple users and services.
Prioritized remediation: Upgrade Apache Airflow providers keycloak to version 0.10.0 or later to bind cookie-supplied tokens with the session identity.

auth-bypassprivilege-escalationwebairflow

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

Apache Airflow Keycloak provider: from Airflow 3.3 the Keycloak auth manager takes a user's identity from the signed Airflow session token but takes the Keycloak access and refresh tokens used for every authorization decision from separate, unauthenticated cookies, and never checks that the two describe the same subject. A user who holds any valid Airflow login of their own, together with another subject's Keycloak access or refresh token obtained out of band, can pair the two: Airflow then authorizes requests with the foreign token's privileges while the session identity, audit log and cache keys continue to name the attacker's own account. The refresh path re-issues an Airflow session token for the original identity carrying the foreign tokens, so the mismatched pairing survives across sessions. Affects deployments running Airflow 3.3 or later with the Keycloak auth manager. Earlier versions carried the Keycloak tokens inside the signed session token, so the binding existed and was lost when they moved into separate cookies. Users of apache-airflow-providers-keycloak are recommended to upgrade to version 0.10.0 or later, which binds the cookie-supplied tokens to the session identity.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weaknesses

CWE-565

Vendors

apache

Products

apache-airflow-providers-keycloak

Public exploit & PoC references

https://github.com/apache/airflow/pull/72207[Patch, Vendor Advisory]

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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