UBUNTU-CVE-2026-40176

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Source

https://ubuntu.com/security/CVE-2026-40176

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40176.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-40176

Upstream

CVE-2026-40176

Published

2026-04-15T21:17:00Z

Modified

2026-05-20T16:25:38.478725582Z

Severity

7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Composer is a dependency manager for PHP. Versions 1.0 through 2.2.26 and 2.3 through 2.9.5 contain a command injection vulnerability in the Perforce::generateP4Command() method, which constructs shell commands by interpolating user-supplied Perforce connection parameters (port, user, client) without proper escaping. An attacker can inject arbitrary commands through these values in a malicious composer.json declaring a Perforce VCS repository, leading to command execution in the context of the user running Composer, even if Perforce is not installed. VCS repositories are only loaded from the root composer.json or the composer config directory, so this cannot be exploited through composer.json files of packages installed as dependencies. Users are at risk if they run Composer commands on untrusted projects with attacker-supplied composer.json files. This issue has been fixed in Composer 2.2.27 (2.2 LTS) and 2.9.6 (mainline).

References

Affected packages

Ubuntu:25.10

composer

Package

Name: composer
Purl: pkg:deb/ubuntu/composer?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.8.6-1

2.8.8-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "composer",
            "binary_version": "2.8.8-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40176.json"

Ubuntu:26.04:LTS

composer

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.8.8-1

2.9.5-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "composer",
            "binary_version": "2.9.5-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40176.json"

Ubuntu:Pro:16.04:LTS

composer

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.0~alpha10+20150602-1

1.0.0~alpha10+20150602-2

1.0.0~alpha11-1

1.0.0~alpha11-1ubuntu1

1.0.0~alpha11-2

1.0.0~alpha11-3

1.0.0~beta1-1ubuntu1

1.0.0~beta2-1

1.0.0~beta2-1ubuntu0.1~esm1

1.0.0~beta2-1ubuntu0.1~esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "composer",
            "binary_version": "1.0.0~beta2-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40176.json"

Ubuntu:Pro:18.04:LTS

composer

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.5.1-1

1.5.2-1

1.6.2-1

1.6.3-1

1.6.3-1ubuntu0.1~esm1

1.6.3-1ubuntu0.1~esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "composer",
            "binary_version": "1.6.3-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40176.json"

Ubuntu:Pro:20.04:LTS

composer

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.9.0-2

1.9.1-1

1.9.2-1

1.9.3-1

1.10.0-1

1.10.1-1

1.10.1-1ubuntu0.1~esm1

1.10.1-1ubuntu0.1~esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "composer",
            "binary_version": "1.10.1-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40176.json"

Ubuntu:Pro:22.04:LTS

composer

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.9-2ubuntu2

2.0.9-2ubuntu3

2.0.13-1ubuntu1

2.1.12-1ubuntu1

2.2.6-2ubuntu4

2.2.6-2ubuntu4+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "composer",
            "binary_version": "2.2.6-2ubuntu4+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40176.json"

Ubuntu:Pro:24.04:LTS

composer

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.5.8-1

2.6.5-1

2.6.6-1

2.7.1-2

2.7.1-2ubuntu0.1~esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "composer",
            "binary_version": "2.7.1-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40176.json"