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Highest advisory severityCritical 1 vendor · 2 advisories

CVE-2026-94135

CVE-2026-94135 is covered by the Apache CVE-2026-94134 security bulletin. Not in the CISA KEV catalog. Critical advisory severity. 2 advisories from Apache.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

NVD detail CVE.org

CVE-2026-94135 at a glance

CISA KEV
Not listed (catalog checked )
Highest advisory severity
Critical
Vendor advisories
2 from Apache
VulniPulse record
Published · Updated

Is CVE-2026-94135 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-94135 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-94135?

This CVE is tracked through a multi-CVE bulletin, so its fixed releases may differ from the bulletin-wide values below. Check the vendor source.

Vendor advisory comparison

Apache

2 advisories
  • Advisory severityCritical9.1

    Critical [CVE-2026-94134 +1] The Apache Airflow SSH provider hook disables SSH host-key verification by default: unless `host_key` is configured or `no_host_key_check` is explicitly set to false, it accepts any server key

    CVE-2026-94134Source published Source updated

    This bulletin covers 2 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.

    The Apache Airflow SSH provider hook disables SSH host-key verification by default: unless `host_key` is configured or `no_host_key_check` is explicitly set to false, it accepts any server key. This affects SSH and SFTP connections that rely on the default. An attacker in a machine-in-the-middle position between the worker and the SSH or SFTP server can impersonate the server and capture the credentials or data a task sends. Users of apache-airflow-providers-ssh and apache-airflow-providers-sftp are recommended to upgrade to apache-airflow-providers-ssh 7.0.0 and apache-airflow-providers-sftp 7.0.0 or later. The deferrable SFTP code paths had the same default and are covered separately by CVE-2026-94135; apache-airflow-providers-sftp 7.0.0 fixes both.

    Affected products in this advisory
    • Apache Airflow SSH provider
    • Apache Airflow SFTP provider
    Source-reported affected versions
    • Apache Airflow SSH provider before 7.0.0
    • Apache Airflow SFTP provider before 7.0.0
    Source-reported fixed versions
    • 7.0.0
    Mitigation guidance
    • Users of apache-airflow-providers-ssh and apache-airflow-providers-sftp are recommended to upgrade to apache-airflow-providers-ssh 7.0.0 and apache-airflow-providers-sftp 7.0.0 or later.
    Full advisory and evidenceOpen source bulletin
  • Advisory severityMedium4.3

    Medium [CVE-2026-94134 +1] The Apache Airflow SFTP provider's deferrable code paths (`SFTPTrigger`, `SFTPHookAsync`, `SFTPClientPool`) disable SSH host-key verification by default unless the connection explicitly sets `no_host_key_check` to false

    CVE-2026-94135Source published Source updated

    This bulletin covers 2 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.

    The Apache Airflow SFTP provider's deferrable code paths (`SFTPTrigger`, `SFTPHookAsync`, `SFTPClientPool`) disable SSH host-key verification by default unless the connection explicitly sets `no_host_key_check` to false. Deployments that run SFTP sensors or operators in deferrable mode are affected. An attacker in a machine-in-the-middle position between the triggerer and the SFTP server can impersonate the server and capture the credentials or data exchanged. Users of apache-airflow-providers-sftp are recommended to upgrade to apache-airflow-providers-sftp 7.0.0 or later. This is a separate defect from CVE-2026-94134 (the synchronous SSH hook default, which also affects the SFTP hook); users who applied the fix for one also need this release for the other - apache-airflow-providers-sftp…

    Affected products in this advisory
    • Apache Airflow SFTP provider
    Source-reported affected versions
    • Apache Airflow SFTP provider before 7.0.0
    Source-reported fixed versions
    • 7.0.0
    Mitigation guidance
    • Users of apache-airflow-providers-sftp are recommended to upgrade to apache-airflow-providers-sftp 7.0.0 or later.
    Workarounds
    • The Apache Airflow SFTP provider's deferrable code paths (`SFTPTrigger`, `SFTPHookAsync`, `SFTPClientPool`) disable SSH host-key verification by default unless the connection explicitly sets `no_host_key_check` to false.
    Full advisory and evidenceOpen source bulletin

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