CVE-2025-26465

CVE-2025-26465 The OpenSSH client contains a logic error between versions 6.8p1 to 9.9p1 inclusive that makes it vulnerable to an active MitM attack if the VerifyHostKeyDNS option is enabled, allowing a malicious interloper to impersonate a legitimate server when a client attempts to connect to i...

Curl encryption vulnerability

The curl version 8.22.0 and earlier have an encryption-related vulnerability. This vulnerability arises when libcurl uses libssh2 to process the hash of the knownhosts file. In this case, unrelated initial entries can cause host key verification to falsely report a key mismatch as a key absence...

curl: SSH (SCP/SFTP) host-key verification is skipped on connection reuse — a pinned/known_hosts transfer silently reuses a previously-unverified connection

Summary For SCP/SFTP, curl verifies the server's host key once, during the initial connect state machine, in sshcheckfingerprint — which reads CURLOPTSSHHOSTPUBLICKEYSHA256 / MD5, the CURLOPTSSHKNOWNHOSTS file, and the CURLOPTSSHHOSTKEYFUNCTION callback. That function has exactly one caller,...

Apache Airflow SSH and SFTP Providers 6.0.1 Host Key Verification

Apache Airflow SSH and SFTP providers through version 6.0.1 disable SSH host key verification by default, allowing a man-in-the-middle attacker to impersonate an SSH server. This proof of concept demonstrates acceptance of an untrusted server key. https://packetstorm.news/download/236119...

CVE-2026-87865

A flaw was found in curl. When libcurl is built with the libssh2 backend and uses a hashed known-hosts file, host key verification can mistakenly report a key mismatch as a missing key to custom verification callbacks. A remote attacker who intercepts or controls the Secure Shell SSH connection c...

EUVD-2026-102523

The Apache Airflow SFTP provider's deferrable code paths SFTPTrigger, SFTPHookAsync, SFTPClientPool disable SSH host-key verification by default unless the connection explicitly sets nohostkeycheck to false. Deployments that run SFTP sensors or operators in deferrable mode are affected. An attack...

CVE-2026-94134

The Apache Airflow SSH provider hook disables SSH host-key verification by default: unless hostkey is configured or nohostkeycheck 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...

CVE-2026-94135

The Apache Airflow SFTP provider's deferrable code paths SFTPTrigger, SFTPHookAsync, SFTPClientPool disable SSH host-key verification by default unless the connection explicitly sets nohostkeycheck to false. Deployments that run SFTP sensors or operators in deferrable mode are affected. An attack...

CVE-2026-94135 Apache Airflow SFTP provider: Async SFTP hook disables host-key verification by default

The Apache Airflow SFTP provider's deferrable code paths SFTPTrigger, SFTPHookAsync, SFTPClientPool disable SSH host-key verification by default unless the connection explicitly sets nohostkeycheck to false. Deployments that run SFTP sensors or operators in deferrable mode are affected. An attack...

CVE-2026-94135 Apache Airflow SFTP provider: Async SFTP hook disables host-key verification by default

The Apache Airflow SFTP provider's deferrable code paths SFTPTrigger, SFTPHookAsync, SFTPClientPool disable SSH host-key verification by default unless the connection explicitly sets nohostkeycheck to false. Deployments that run SFTP sensors or operators in deferrable mode are affected. An attack...

CVE-2026-94135

The Apache Airflow SFTP provider's deferrable code paths "SFTPTrigger", "SFTPHookAsync", "SFTPClientPool" disable SSH host-key verification by default unless the connection explicitly sets "nohostkeycheck" to false. Deployments that run SFTP sensors or operators in deferrable mode are affected. A...

CVE-2026-94135

The Apache Airflow SFTP provider contains a vulnerability where the deferrable code paths (SFTPTrigger , SFTPHookAsync , and SFTPClientPool ) disable SSH host-key verification by default. This occurs unless the connection explicitly sets no_host_key_check to false. Affected deployments running SF...

CVE-2026-94135 Apache Airflow SFTP provider: Async SFTP hook disables host-key verification by default

The Apache Airflow SFTP provider's deferrable code paths SFTPTrigger, SFTPHookAsync, SFTPClientPool disable SSH host-key verification by default unless the connection explicitly sets nohostkeycheck to false. Deployments that run SFTP sensors or operators in deferrable mode are affected. An attack...

CVE-2026-94134

The Apache Airflow SSH provider hook contains a vulnerability where it disables SSH host-key verification by default. Unless a host_key is configured or no_host_key_check is explicitly set to false, the hook accepts any server key. This affects both SSH and SFTP connections and allows an attacker...

CVE-2026-94134

The Apache Airflow SSH provider hook disables SSH host-key verification by default: unless "hostkey" is configured or "nohostkeycheck" 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...

CVE-2026-94134 Apache Airflow SSH provider, Apache Airflow SFTP provider: SSH hook disables host-key verification by default

The Apache Airflow SSH provider hook disables SSH host-key verification by default: unless hostkey is configured or nohostkeycheck 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...

CVE-2026-94134 Apache Airflow SSH provider, Apache Airflow SFTP provider: SSH hook disables host-key verification by default

The Apache Airflow SSH provider hook disables SSH host-key verification by default: unless hostkey is configured or nohostkeycheck 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...

CVE-2026-94134 Apache Airflow SSH provider, Apache Airflow SFTP provider: SSH hook disables host-key verification by default

The Apache Airflow SSH provider hook disables SSH host-key verification by default: unless hostkey is configured or nohostkeycheck 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...

Astra Linux – Vulnerability in OpenSSH

A vulnerability was discovered in OpenSSH when the VerifyHostKeyDNS option is enabled. A man-in-the-middle attack can be carried out by a malicious machine pretending to be a legitimate server. This issue arises due to the way OpenSSH handles error codes under certain conditions during the...

CVE-2026-94134: Key Exchange without Entity Authentication

The Apache Airflow SSH provider hook disables SSH host-key verification by default: unless hostkey is configured or nohostkeycheck 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...