PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-25604 Apache Software Foundation CVE debrief

CVE-2026-25604 is a medium-severity vulnerability in Apache Airflow Providers Amazon, affecting versions prior to 9.22.0. The issue arises from the AWS Auth manager's failure to verify the origin of the SAML authentication response, allowing attackers to reuse SAML responses from other instances with potentially different access controls. This could lead to unauthorized access across different instances. The vulnerability has a CVSS score of 5.4 and is classified as CWE-346. To mitigate this vulnerability, users should upgrade to version 9.22.0 of the provider.

Vendor
Apache Software Foundation
Product
Apache Airflow Providers Amazon
CVSS
MEDIUM 5.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-09
Original CVE updated
2026-07-02
Advisory published
2026-03-09
Advisory updated
2026-07-02

Who should care

Organizations using Apache Airflow Providers Amazon, especially those with multiple instances and varying access controls, should prioritize upgrading to version 9.22.0. This vulnerability could allow attackers to move laterally across instances, potentially escalating privileges or accessing sensitive data.

Technical summary

The vulnerability exists in the AWS Auth manager's handling of SAML authentication responses. By not verifying the origin of these responses, an attacker could reuse a SAML response from one instance on another, potentially bypassing access controls. This issue is particularly concerning for environments with multiple Airflow instances, each with different access controls. The vulnerability is addressed in version 9.22.0 of the Apache Airflow Providers Amazon.

Defensive priority

Upgrade to version 9.22.0 of Apache Airflow Providers Amazon. Review and adjust access controls across Airflow instances to ensure least privilege access.

Recommended defensive actions

  • Upgrade to Apache Airflow Providers Amazon version 9.22.0 or later.
  • Review and adjust access controls across Airflow instances to ensure least privilege access.
  • Monitor for unusual SAML authentication activity across Airflow instances.
  • Implement additional logging and monitoring for AWS Auth manager activities.
  • Consider compensating controls, such as IP restrictions or additional authentication factors, for sensitive instances.

Evidence notes

The CVE-2026-25604 vulnerability was publicly disclosed on March 9, 2026, and last modified on July 2, 2026. The issue was identified and reported through the Apache security mailing list. The CVSS score of 5.4 indicates a medium-severity vulnerability. The CWE-346 classification highlights the improper verification of authentication mechanisms.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-25604 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-25604

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-25604 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-25604

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.