CVE-2026-25604Network attack vector

Authenticated cross-instance access via SAML response replay

Published Mar 9, 2026 · Updated Mar 9, 2026

Authentication bypass in AWS Auth Manager for Airflow Amazon Provider 8.0.0 through 9.21.x allows remote authenticated users to access instances. The login callback's _prepare_request function copies the client-supplied Host header into http_host, causing SAML response validation to compare the destination with client-controlled origin data instead of the configured API base URL. A valid SAML response and low-privilege access to one federated instance are required; replay against another instance bypasses its differing access controls.

CVSS severity5.4
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in AWS Auth Manager for Airflow Amazon Provider 8.0.0 through 9.21.x allows remote authenticated users to access instances. The login callback's _prepare_request function copies the client-supplied Host header into http_host, causing SAML response validation to compare the destination with client-controlled origin data instead of the configured API base URL. A valid SAML response and low-privilege access to one federated instance are required; replay against another instance bypasses its differing access controls.

The record

CVE
CVE-2026-25604
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
The Apache Software Foundation
Product
Apache Airflow Amazon Provider
Classifications
CWE-346, T1550.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.0.0 <9.22.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Airflow Amazon Providerversion=8.0.0 <9.22.0

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error
T1550.002Pass the SAML Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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