CVE-2026-5917

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Source
https://cve.org/CVERecord?id=CVE-2026-5917
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5917.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-5917
Downstream
Related
Published
2026-08-11T21:40:29.078Z
Modified
2026-08-16T11:56:56.736511392Z
Severity
  • 9.4 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
Summary
libgit2 v0.27.0-v1.9.0 Shell Command Injection via ssh_libssh2 Backend
Details

libgit2 versions v0.27.0 through v1.9.0 built with the libssh2 SSH backend (USESSH=libssh2) contain a shell command injection vulnerability that allows remote attackers to execute arbitrary commands on an SSH server by supplying a repository path containing unescaped shell metacharacters such as single quotes, semicolons, or pipes. The genproto() function in sshlibssh2.c inserts the repository path directly into a shell command string without escaping special characters before passing it to libssh2channel_exec(), enabling an attacker to craft a malicious submodule URL in a .gitmodules file that, when processed during a recursive clone, causes the remote server's shell to interpret injected commands under the victim's SSH user account.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5917.json"
}
References

Affected packages

Git / github.com/libgit2/libgit2

Affected ranges

Type
GIT
Repo
https://github.com/libgit2/libgit2
Events
Introduced
6311e886d8b5377c6037cd9937ccf66a71f3361d
Fixed
338e6fb681369ff0537719095e22ce9dc602dbf0
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0.27.0"
        },
        {
            "last_affected": "1.9.0"
        },
        {
            "introduced": "v0.27.0"
        },
        {
            "fixed": "v1.9.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

v0.*
v0.27.0
v0.28.0
v0.28.0-rc1
v0.99.0
v1.*
v1.0.0
v1.1.0
v1.2.0
v1.3.0
v1.4.0
v1.5.0
v1.6.1
v1.6.2
v1.6.3
v1.7.0
v1.8.0
v1.8.1
v1.8.2
v1.8.2-rc1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5917.json"