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CVE-2026-5917 is a shell command injection vulnerability in libgit2 builds configured to use the libssh2 SSH backend. In ssh_libssh2.c, gen_proto() incorporates the remote repository path into a command string without escaping shell metacharacters before sending that command through libssh2_channel_exec(). A repository path containing shell syntax can therefore alter the command interpreted by the remote SSH server. A malicious repository can embed such a path in a submodule URL, causing injection when a user performs a recursive clone. Affected versions are releases before 1.8.7 and 1.9.x releases before 1.9.7 when built with USE_SSH=libssh2.
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A high-impact vulnerability affecting cargo-c packages on Amazon Linux 2023. It is network-accessible, requires low attack complexity and no privileges, but requires user interaction; successful exploitation can result in high confidentiality, integrity, and availability impact.
A shell-command-injection vulnerability in libgit2's libssh2 SSH backend. Repository paths containing unescaped shell metacharacters can lead to arbitrary command execution on an SSH server when a malicious submodule is processed during recursive cloning.
A libgit2 vulnerability covered by Debian advisory DSA-6453 affecting Debian 13/libgit2 packages; the advisory states the issues could lead to arbitrary command execution on a remote SSH server, credential disclosure, denial of service, or directory creation outside a repository working tree.
An arbitrary code execution vulnerability in libgit2 caused by shell command injection in the SSH backend.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.