---
id: "CVE-2026-86467"
kind: "vulnerability"
aliases: ["CVE-2026-86467"]
title: "Apache Airflow Amazon provider: SAML login lets attackers hijack victim sessions"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["apache-airflow", "aws", "package", "python", "saml", "self-hosted"]
not_affected_if: ["default-config", "other-auth-manager"]
published_at: "2026-10-20T03:17:16+00:00"
first_seen_at: "2026-10-23T21:57:20+00:00"
updated_at: "2026-10-25T05:04:56+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86467", "first_seen_at": "2026-10-23T21:57:20+00:00"}]
---

# Apache Airflow Amazon provider: SAML login lets attackers hijack victim sessions

The AWS auth manager's SAML login flow does not tie the authentication response to the browser that started it, so a SAML response from the attacker can be accepted in a victim's browser. An attacker who gets a victim to load a page can silently log the victim into the attacker's Airflow account, and the victim's later work lands in a session the attacker controls.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed version with `pip show apache-airflow-providers-amazon`
- Confirm the deployment uses the AWS auth manager with SAML authentication (look for `auth_manager` set to the AWS auth manager in the Airflow configuration)

## Fix

- Upgrade `apache-airflow-providers-amazon` to `9.38.0` or later

## Timeline

- 2026-10-23T21:57:20+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-86467

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_