CVE-2026-76187: Apache Airflow Keycloak provider: the unauthenticated token endpoint accepts a client-credentials grant for an

Q: How do I fix CVE-2026-76187?

apache-airflow-providers-keycloak: upgrade to 0.10.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-76187 being exploited?

CVE-2026-76187 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-76187 affect?

CVE-2026-76187 affects apache-airflow-providers-keycloak. Severity is critical (CVSS 9.8). Apache Airflow Keycloak provider: the unauthenticated token endpoint accepts a client-credentials grant for any confidential client registered in the Keycloak realm, not only the client configured for Airflow. No allowlist restricts which c

Q: How urgent is CVE-2026-76187?

Priority 63/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADE

CVE-2026-76187 is a critical-severity flaw (CVSS 9.8) affecting apache-airflow-providers-keycloak. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Apache Airflow Keycloak provider: the unauthenticated token endpoint accepts a client-credentials grant for any confidential client registered in the Keycloak realm, not only the client configured for Airflow. No allowlist restricts which client ids may authenticate, so the credentials of an unrelated application that happens to share the realm are valid Airflow login credentials, and Airflow mints a signed session token for that application's se

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-09-16
Last modified	2026-09-18

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-09-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-16 10:16 UTCPublished CVE record published
2026-09-18 14:27 UTCUpdated Record last modified

apache apache-airflow-providers-keycloak UPGRADE

Affected: < 0.10.0

Fixed in: 0.10.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy apache-airflow-providers-keycloak || rpm -q apache-airflow-providers-keycloak || apache-airflow-providers-keycloak --version

2. UPGRADE to 0.10.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade apache-airflow-providers-keycloak

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade apache-airflow-providers-keycloak

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora ELN · xfsdump · FIXED · 3.3.0-3.eln159 · FEDORA-2026-6e9bb3f901 · source

sudo dnf upgrade --advisory=FEDORA-2026-6e9bb3f901

Fedora 46 · fio · FIXED · 3.43-2.fc46 · FEDORA-2026-b36219886b · source

sudo dnf upgrade --advisory=FEDORA-2026-b36219886b

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-76187?

apache-airflow-providers-keycloak: upgrade to 0.10.0. Exact commands for each OS are on this page.

Is CVE-2026-76187 being exploited?

CVE-2026-76187 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-76187 affect?

CVE-2026-76187 affects apache-airflow-providers-keycloak. Severity is critical (CVSS 9.8). Apache Airflow Keycloak provider: the unauthenticated token endpoint accepts a client-credentials grant for any confidential client registered in the Keycloak realm, not only the client configured for Airflow. No allowlist restricts which c

How urgent is CVE-2026-76187?

Priority 63/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Keycloak vulnerabilities · Apache Airflow vulnerabilities

Related CVEs

CVE-2026-40948 MEDIUM 5.4 UPGRADE The Keycloak authentication manager in `apache-airflow-providers-keycloak` did not generate or validate the OA
CVE-2026-76186 CRITICAL 9.1 UPGRADE Apache Airflow Keycloak provider: from Airflow 3.3 the Keycloak auth manager takes a user's identity from the

References

← Back to latest CVEs