CVE-2026-86467

HighCVSS 8.8

Published: 20/10/2026(UTC)Updated: 29/10/2026(UTC)Translated: 20/10/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.26%

18th percentile - higher than 18% of all known CVEs

Summary

In Apache Airflow Amazon provider, the AWS auth manager's SAML login flow does not bind the authentication response to the browser that began it. The login handler discards the AuthnRequest ID and the callback validates the assertion without requiring a matching InResponseTo, allowing an unauthenticated attacker to silently log a victim into the attacker's Airflow account.

Risk Assessment

An attacker can silently log a victim into the attacker's Airflow account, and subsequent victim actions land in an attacker-controlled session. This may lead to data leakage and actions performed on the victim's behalf.

Recommendation

Upgrade apache-airflow-providers-amazon to version 9.38.0, which fixes the issue. Until then, consider disabling SAML login in the AWS auth manager or limiting trust in it.

Other vulnerabilities in apache-airflow-providers-amazon

CVE-2026-42526Medium
In the AWS Secrets Manager and SSM Parameter Store secrets backends of apache-airflow-providers-amazon prior to 9.28.0, the team-scoping logic could resolve a conn_id containing a '/' (e.g. 'my_team/conn') to the same path as another team's team-scoped secret when the caller had no team context. A privileged caller without team context could retrieve another team's secret by crafting a colliding conn_id. Fixed in 9.28.0 by switching the team-scope separator to '--' and rejecting team-shaped conn_ids when team context is absent. Affects the experimental multi-tenant teams feature only.

Original NVD description (English source)

Apache Airflow Amazon provider: the AWS auth manager's SAML login flow does not bind the authentication response to the browser that began it. The login handler discards the AuthnRequest ID and the callback validates the assertion without requiring a matching InResponseTo, so an unauthenticated attacker who can cause a victim to load a page can complete a SAML login in the victim's browser using the attacker's own assertion, silently logging the victim into the attacker's Airflow account. Subsequent work the victim performs lands in a session the attacker controls. Affects deployments using the AWS auth manager with SAML authentication. The victim needs only to visit an attacker-controlled page; no Airflow account or credential is required of the attacker. This is the same login-CSRF class fixed in the Keycloak auth manager as CVE-2026-40948. Users of apache-airflow-providers-amazon are recommended to upgrade to version 9.38.0, which fixes the issue.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS