UBUNTU-CVE-2026-5917

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Source
https://ubuntu.com/security/CVE-2026-5917
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5917.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-5917
Upstream
Published
2026-08-13T00:00:00Z
Modified
2026-08-13T19:30:17.024538834Z
Severity
  • 9.6 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CVSS Calculator
  • 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
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:24.04:LTS
libgit2

Package

Name
libgit2
Purl
pkg:deb/ubuntu/libgit2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.5.1+ds-1ubuntu1
1.7.1+ds-2ubuntu1
1.7.2+ds-1ubuntu1
1.7.2+ds-1ubuntu2
1.7.2+ds-1ubuntu3
1.7.2+ds-1ubuntu3.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.7.2+ds-1ubuntu3.1",
            "binary_name": "libgit2-1.7"
        },
        {
            "binary_version": "1.7.2+ds-1ubuntu3.1",
            "binary_name": "libgit2-fixtures"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5917.json"
Ubuntu:26.04:LTS
libgit2

Package

Name
libgit2
Purl
pkg:deb/ubuntu/libgit2?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.9.0+ds-2ubuntu2
1.9.1+ds-1ubuntu1
1.9.1+ds-1ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.9.1+ds-1ubuntu1.1",
            "binary_name": "libgit2-1.9"
        },
        {
            "binary_version": "1.9.1+ds-1ubuntu1.1",
            "binary_name": "libgit2-fixtures"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5917.json"
Ubuntu:Pro:14.04:LTS
libgit2

Package

Name
libgit2
Purl
pkg:deb/ubuntu/libgit2?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.19.0-2
0.19.0-2ubuntu0.4
0.19.0-2ubuntu0.4+esm1
0.19.0-2ubuntu0.4+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.19.0-2ubuntu0.4+esm2",
            "binary_name": "libgit2-0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5917.json"
Ubuntu:Pro:16.04:LTS
libgit2

Package

Name
libgit2
Purl
pkg:deb/ubuntu/libgit2?arch=source&distro=esm-apps-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.22.2-2
0.23.1-1
0.24.1-2
0.24.1-2ubuntu0.2
0.24.1-2ubuntu0.2+esm1
0.24.1-2ubuntu0.2+esm2
0.24.1-2ubuntu0.2+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.24.1-2ubuntu0.2+esm3",
            "binary_name": "libgit2-24"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5917.json"
Ubuntu:Pro:18.04:LTS
libgit2

Package

Name
libgit2
Purl
pkg:deb/ubuntu/libgit2?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.25.1+really0.24.6-1
0.26.0+dfsg.1-1.1
0.26.0+dfsg.1-1.1build1
0.26.0+dfsg.1-1.1ubuntu0.2
0.26.0+dfsg.1-1.1ubuntu0.2+esm1
0.26.0+dfsg.1-1.1ubuntu0.2+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.26.0+dfsg.1-1.1ubuntu0.2+esm2",
            "binary_name": "libgit2-26"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5917.json"
Ubuntu:Pro:20.04:LTS
libgit2

Package

Name
libgit2
Purl
pkg:deb/ubuntu/libgit2?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.27.7+dfsg.1-0.2build1
0.28.3+dfsg.1-1
0.28.3+dfsg.1-1ubuntu1
0.28.4+dfsg.1-2
0.28.4+dfsg.1-2ubuntu0.1
0.28.4+dfsg.1-2ubuntu0.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.28.4+dfsg.1-2ubuntu0.1+esm1",
            "binary_name": "libgit2-28"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5917.json"
Ubuntu:Pro:22.04:LTS
libgit2

Package

Name
libgit2
Purl
pkg:deb/ubuntu/libgit2?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.1.0+dfsg.1-4
1.1.0+dfsg.1-4.1
1.1.0+dfsg.1-4.1build1
1.1.0+dfsg.1-4.1ubuntu0.1
1.1.0+dfsg.1-4.1ubuntu0.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.1.0+dfsg.1-4.1ubuntu0.1+esm1",
            "binary_name": "libgit2-1.1"
        },
        {
            "binary_version": "1.1.0+dfsg.1-4.1ubuntu0.1+esm1",
            "binary_name": "libgit2-fixtures"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-5917.json"