CVE-2026-40948

mediumpriority · track · 0EPSS 0.004 · 35 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.40% (35th) EPSS

CVSS 5.4 · medium

Is it mine?

4 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-28

The Keycloak authentication manager in `apache-airflow-providers-keycloak` did not generate or validate the OAuth 2.0 `state` parameter on the login / login-callback flow, and did not use PKCE. An attacker with a Keycloak account in the same realm could deliver a crafted callback URL to a victim's browser and cause the victim to be logged into the attacker's Airflow session (login-CSRF / session fixation), where any credentials the victim subsequently stored in Airflow Connections would be harvestable by the attacker. Users are advised to upgrade `apache-airflow-providers-keycloak` to 0.7.0 or later.

cvss

Technical severity, 0–10. One row per scoring source.

5.4

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Nsecondary · ENISA EU

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Nsecondaryexploitability 2.8 · impact 2.5

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Nsecondary · OSV

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-352USCWE-352US

affected products (4)

Products and version ranges known to be affected.

Apache Airflow< 0.7.0cert_bundDE
Apache Software Foundation Apache Airflow Providers Keycloak0.0.1 → 0.7.0enisa_euvdEU
apache apache-airflow-providers-keycloak0.0.1 → 0.7.0nvdUScpe:2.3:a:apache:apache-airflow-providers-keycloak:*:*:*:*:*:*:*:*
PyPI apache-airflow-providers-keycloak0.0.1 → 0.7.0osvUSpkg:pypi/apache-airflow-providers-keycloak

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1168Apache Airflow und Apache Airflow Keycloak Provider: Mehrere SchwachstellenDeutsch2026-04-19csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Apache Airflow und dem Airflow Keycloak Provider ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren und vertrauliche Informationen offenzulegen.
WID-SEC-W-2026-4052Apache Airflow: Mehrere Schwachstellen ermöglichen Umgehen von SicherheitsvorkehrungenDeutsch2026-10-19csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Apache Airflow ausnutzen, um Sicherheitsvorkehrungen zu umgehen und Informationen offenzulegen.
GHSA-5w6h-pjw6-wvc6apache-airflow-providers-keycloak: Missing OAuth 2.0 State and PKCE Enables Login CSRF and Session Fixation2026-04-18ghsa · osvUS
The Keycloak authentication manager in `apache-airflow-providers-keycloak` did not generate or validate the OAuth 2.0 `state` parameter on the login / login-callback flow, and did not use PKCE. An attacker with a Keycloak account in the same realm could deliver a crafted callback URL to a victim's browser and cause the victim to be logged into the attacker's Airflow session (login-CSRF / session fixation), where any credentials the victim subsequently stored in Airflow Connections would be harvestable by the attacker. Users are advised to upgrade `apache-airflow-providers-keycloak` to 0.7.0 or later.
PYSEC-2026-2369apache-airflow-providers-keycloak: Missing OAuth 2.0 State and PKCE Enables Login CSRF and Session Fixation2026-07-13vendor · osvUS
The Keycloak authentication manager in `apache-airflow-providers-keycloak` did not generate or validate the OAuth 2.0 `state` parameter on the login / login-callback flow, and did not use PKCE. An attacker with a Keycloak account in the same realm could deliver a crafted callback URL to a victim's browser and cause the victim to be logged into the attacker's Airflow session (login-CSRF / session fixation), where any credentials the victim subsequently stored in Airflow Connections would be harvestable by the attacker. Users are advised to upgrade `apache-airflow-providers-keycloak` to 0.7.0 or later.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv cert_bund nvd NVD CVE.org MITRE

published 2026-04-18modified 2026-10-25

references (8)

External citations — patches, advisories, analysis.

https://access.redhat.com/security/cve/cve-2026-40948 cnnvd
https://airflow.apache.org/Patchcnnvd
https://nvd.nist.gov/vuln/detail/CVE-2026-40948 cnnvd
https://github.com/apache/airflow/pull/64114 enisa_euvd
https://lists.apache.org/thread/kc0odpr70hbqhdb9ksnz42fkqz2xld9q enisa_euvd
http://www.openwall.com/lists/oss-security/2026/04/17/14Mailing ListThird Party Advisorynvd
https://github.com/apache/airflow/pull/64114Issue TrackingPatchnvd
https://lists.apache.org/thread/kc0odpr70hbqhdb9ksnz42fkqz2xld9qMailing ListVendor Advisorynvd

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