CVE-2026-59846 Libssh: libssh: information disclosure via proxycommand %r username expansion

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior...

CVE-2026-59846

CVE-2026-59846 affects libssh: a flaw in ProxyCommand handling where a malicious username expanded via %r can inject shell metacharacters, exposing environment variables and causing unintended shell behavior. No specific exploit/public-fix details are provided in the connected documents; remediat...

CVE-2026-59846

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior...

CVE-2026-59846

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior...

CVE-2026-59846 Libssh: libssh: information disclosure via proxycommand %r username expansion

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior...

CVE-2026-59846

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior...

CVE-2026-59846

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior. Mitigation Make sure you are not executing connections with untrusted username inputs...

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Overview Affected versions of this package are vulnerable to Improper Neutralization of Special Elements in Output Used by a Downstream Component 'Injection' in the ProxyCommand process when a malicious username is expanded through %r, which can inject shell metacharacters, expose environment...

UBUNTU-CVE-2026-59844

A flaw was found in libssh. A remote authenticated client can issue SSHFXPREAD requests with an arbitrarily large length, causing a libssh SFTP server to allocate excessive memory and potentially exhaust it through repeated requests...

CVE-2026-59843 Libssh: libssh: denial of service via zero advertised channel packet size

A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size in SSHMSGCHANNELOPEN, causing later channel writes to loop indefinitely and consume CPU, leading to denial of service...

CVE-2026-64878: Improper Neutralization of Special Elements used in an OS Command

Unvalidated input in asset filter parameters allows shell metacharacters to escape command argument handling, resulting in remote code execution as a low-privileged OS user via the Analysis REST endpoint...

CARE: Pre-Execution Command Verification for Shell-Executing LLM Agents

Large Language Model LLM agents are increasingly used for coding and terminal automation, making shell-command dispatch a high-stakes runtime control point. We study command-level pre-execution mediation for individual shell commands produced by LLM agents under bounded path context. Existing...

PT-2026-62103

Name of the Vulnerable Software and Affected Versions The product name cannot be determined. affected versions not specified Description An issue exists in the audit file upload functionality where a filename provided during the upload process is not properly sanitized before being used in system...

PT-2026-62102

Name of the Vulnerable Software and Affected Versions The product name cannot be determined affected versions not specified Description Unvalidated input in asset filter parameters allows shell metacharacters to escape command argument handling. This leads to remote code execution as a...

PT-2026-63284

Name of the Vulnerable Software and Affected Versions Gitea affected versions not specified Description An authenticated user can cause a denial of service by submitting a specially crafted RFC 4716 SSH2 public key to the SSH key ingestion endpoint. The issue stems from a normalization function...

PT-2026-62105

Name of the Vulnerable Software and Affected Versions The product name cannot be determined affected versions not specified Description The audit file upload handler fails to sanitize filenames, which allows shell metacharacters to be passed into system command execution. This input validation...

PT-2026-61936

Name of the Vulnerable Software and Affected Versions libssh affected versions not specified Description A flaw exists in the handling of ProxyCommand where a malicious username expanded through the %r variable can inject shell metacharacters. This can lead to the exposure of environment variable...

CVE-2026-59846: Improper Neutralization of Special Elements used in an OS Command

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior...

CVE-2026-64879: Improper Neutralization of Special Elements used in an OS Command

A filename supplied during file upload is not properly sanitized before being used in system command execution, allowing an attacker to inject shell metacharacters and achieve command injection via the audit file upload functionality...

CVE-2026-64625

AVideo before 29.0 contains an incomplete fix for CVE-2026-45578 where execAsync re-wraps escaped commands in double-quoted sh -c, allowing command substitution via $ and backticks. Attackers can inject arbitrary OS commands through the Live plugin onpublish.php endpoint despite escapeshellarg...