ANT-2026-2NNMB24E · openssh · stack-overflow

stack-overflow low Severity Claude critical · Security research firm low · Maintainer - Discovered by Claude Mythos Preview REPORT Anthropic's analysis, sealed at approval. Disclosure to the maintainer was performed by Calif. ANT-2026-2NNMB24E: stack-overflow in openssh OpenSSH's matchpattern in...

CVE-2026-73282

A flaw was found in OpenSSH. A use-after-free vulnerability exists in the ssh client when handling concurrent remote-forwarding operations. This can occur if a remote forwarding is added via the local session multiplexing socket while a remote forwarding open request is pending with the server. A...

CVE-2026-73283

A flaw was found in OpenSSH's sshd component. The restrict keyword, designed to limit tunnel forwarding within the authorizedkeys file, was not correctly enforced for tunnel forwarding. This issue could allow a local attacker to bypass intended security restrictions, potentially leading to...

SUSE CVE-2026-73281

In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to occur only locally, including operations that add tokens or use keys. This is caused by misinteraction between agent locking and the [email protected] extension...

SUSE CVE-2026-73282

In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent...

SUSE CVE-2026-73283

In sshd in OpenSSH before 10.5, the restrict keyword in authorizedkeys was supposed to be applicable to tunnel forwarding but was not...

JLSEC-2026-1328 In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of...

In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent...

JLSEC-2026-1329 In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be...

In sshd in OpenSSH before 10.5, the restrict keyword in authorizedkeys was supposed to be applicable to tunnel forwarding but was not...

JLSEC-2026-1327 In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to...

In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to occur only locally, including operations that add tokens or use keys. This is caused by misinteraction between agent locking and the [email protected] extension...

JLSEC-2026-1326 ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a...

ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. This outcome occurs only on the client side...

SUSE SLED15: openssh / openssh-askpass-gnome / openssh-clients / openssh-common / etc (SUSE-SU-2026:3605-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3605-1 advisory. - Backported support for the mlkemx25519 key exchange from upstream jscPED-16473. - CVE-2026-59995: sftp:...

Oracle Linux 9 : openssh (ELSA-2026-47756)

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-47756 advisory. - CVE-2026-59996: Fix remote glob result of '..' causing files to be placed in unintended parent directories when scp performs remote-to-remote copy v...

MiracleLinux 9 : openssh-9.9p1-9.el9_8.ML.1 (AXSA:2026-1533:08)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1533:08 advisory. openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in MIRACLE LINUX OpenSSH client versions CVE-2026-55655 openssh: Double...

org.apache.sshd/sshd-core: Apache MINA SSHD: Unauthorized command execution due to improper certificate validation

A flaw was found in Apache MINA SSHD server-side. During user authentication, the server's OpenSSH user certificate validation process failed to properly check for or validate unsupported options like 'force-command' or 'verify-required' embedded within a user's certificate. This oversight could...

org.apache.sshd/sshd-core: Apache MINA SSHD: Unauthorized command execution due to improper certificate validation

A flaw was found in Apache MINA SSHD server-side. During user authentication, the server's OpenSSH user certificate validation process failed to properly check for or validate unsupported options like 'force-command' or 'verify-required' embedded within a user's certificate. This oversight could...

OESA-2026-3351 openssh security update

An open source implementation of SSH protocol version 2 Security Fixes: sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.CVE-2026-59995 scp in OpenSSH before 10.4 may place a file in the...

OESA-2026-3350 openssh security update

An open source implementation of SSH protocol version 2 Security Fixes: sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.CVE-2026-59995 scp in OpenSSH before 10.4 may place a file in the...

OESA-2026-3349 openssh security update

An open source implementation of SSH protocol version 2 Security Fixes: sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.CVE-2026-59995 internal-sftp in sshd in OpenSSH before 10.4...

Security update for openssh

This update for openssh fixes the following issues: Backported support for the mlkemx25519 key exchange from upstream jscPED-16473. CVE-2026-59995: sftp: location of downloaded files not properly constrained when sftp server:/path . is used with an attacker-controlled server bsc1271044...

SUSE-SU-2026:3605-1 Security update for openssh

This update for openssh fixes the following issues: - Backported support for the mlkemx25519 key exchange from upstream jscPED-16473. - CVE-2026-59995: sftp: location of downloaded files not properly constrained when sftp server:/path . is used with an attacker-controlled server bsc1271044. -...