UBUNTU-CVE-2026-40261

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Source

https://ubuntu.com/security/CVE-2026-40261

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40261.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-40261

Upstream

CVE-2026-40261

Published

2026-04-15T21:17:00Z

Modified

2026-05-20T16:25:39.246380384Z

Severity

8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/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::syncCodeBase() method, which appends the $sourceReference parameter to a shell command without proper escaping, and additionally in the Perforce::generateP4Command() method as in GHSA-wg36-wvj6-r67p / CVE-2026-40176, which interpolates user-supplied Perforce connection parameters (port, user, client) from the source url field without proper escaping. An attacker can inject arbitrary commands through crafted source reference or source url values containing shell metacharacters, even if Perforce is not installed. Unlike CVE-2026-40176, the source reference and url are provided as part of package metadata, meaning any compromised or malicious Composer repository can serve package metadata declaring perforce as a source type with malicious values. This vulnerability is exploitable when installing or updating dependencies from source, including the default behavior when installing dev-prefixed versions. This issue has been fixed in Composer 2.2.27 (2.2 LTS) and 2.9.6 (mainline). If developers are unable to immediately update, they can avoid installing dependencies from source by using --prefer-dist or the preferred-install: dist config setting, and only use trusted Composer repositories as a workaround.

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-2026-40261.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-2026-40261.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-2026-40261.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-2026-40261.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-2026-40261.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-2026-40261.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-2026-40261.json"