Medium
composer — security advisory
Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, when Composer is run with -vvv debug verbosity, it could print a credential embedded in the username slot of a repository or package URL, such as a GitHub Personal Access Token in https://TOKEN@host/, to debug output because AuthHelper, Url::sanitize, and ProcessExecutor did not sanitize username-only URL credentials. This issue is fixed in versions 2.2.29 and 2.10.2.
- Products
- composer
- Affected versions
- 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, 1.10.0-1, 1.10.1-1, 1.10.1-1ubuntu0.1~esm1, 1.10.1-1ubuntu0.1~esm2, 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, 1.9.0-2, 1.9.1-1, 1.9.2-1, 1.9.3-1, 2.0.13-1ubuntu1, 2.0.9-2ubuntu2, 2.0.9-2ubuntu3, 2.1.12-1ubuntu1, 2.10.1-2, 2.10.2-1, 2.2.6-2ubuntu4, 2.2.6-2ubuntu4+esm1, 2.5.8-1, 2.6.5-1, 2.6.6-1, 2.7.1-2, 2.7.1-2ubuntu0.1~esm1, 2.8.6-1, 2.8.8-1, 2.9.5-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-59947
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:44 UTC · Revision 1
Source evidence
Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, when Composer is run with -vvv debug verbosity, it could print a credential embedded in the username slot of a repository or package URL, such as a GitHub Personal Access Token in https://TOKEN@host/, to debug output because AuthHelper, Url::sanitize, and ProcessExecutor did not sanitize username-only URL credentials. This issue is fixed in versions 2.2.29 and 2.10.2.
osv:UBUNTU-CVE-2026-59947
composer
Fixed versions: Not specified
composer
Fixed versions: Not specified
composer
Fixed versions: Not specified
composer
Fixed versions: Not specified
composer
Fixed versions: Not specified
composer
Fixed versions: Not specified
composer
Fixed versions: Not specified
composer
Fixed versions: Not specified
Complete source record
{
"id": "bef6b643aa96e195793acdfc4d8977adf12b577c55b51bba13507172a7fa22c5",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-59947",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-59947",
"summary": "Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, when Composer is run with -vvv debug verbosity, it could print a credential embedded in the username slot of a repository or package URL, such as a GitHub Personal Access Token in https://TOKEN@host/, to debug output because AuthHelper, Url::sanitize, and ProcessExecutor did not sanitize username-only URL credentials. This issue is fixed in versions 2.2.29 and 2.10.2.",
"evidence": "osv:UBUNTU-CVE-2026-59947",
"products": [
{
"name": {
"value": "composer",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.0~alpha10+20150602-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~alpha10+20150602-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~alpha11-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~alpha11-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~alpha11-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~alpha11-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~beta1-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~beta2-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~beta2-1ubuntu0.1~esm1",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~beta2-1ubuntu0.1~esm2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "composer",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.5.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.5.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.3-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.3-1ubuntu0.1~esm1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.3-1ubuntu0.1~esm2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "composer",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.9.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.9.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.9.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.9.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.10.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.10.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.10.1-1ubuntu0.1~esm1",
"evidence": "/affected/2/versions"
},
{
"value": "1.10.1-1ubuntu0.1~esm2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "composer",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.9-2ubuntu2",
"evidence": "/affected/3/versions"
},
{
"value": "2.0.9-2ubuntu3",
"evidence": "/affected/3/versions"
},
{
"value": "2.0.13-1ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "2.1.12-1ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.6-2ubuntu4",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.6-2ubuntu4+esm1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "composer",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.5.8-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.5-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.6-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.7.1-2",
"evidence": "/affected/4/versions"
},
{
"value": "2.7.1-2ubuntu0.1~esm1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "composer",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.8.6-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.8.8-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "composer",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.9.5-1",
"evidence": "/affected/6/versions"
},
{
"value": "2.10.1-2",
"evidence": "/affected/6/versions"
},
{
"value": "2.10.2-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "composer",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.8.8-1",
"evidence": "/affected/7/versions"
},
{
"value": "2.9.5-1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-59947",
"aliases": [
"UBUNTU-CVE-2026-59947"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "composer",
"purl": "pkg:deb/ubuntu/composer?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59947.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "composer",
"binary_version": "1.0.0~beta2-1ubuntu0.1~esm2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "composer",
"purl": "pkg:deb/ubuntu/composer?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59947.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "composer",
"binary_version": "1.6.3-1ubuntu0.1~esm2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "composer",
"purl": "pkg:deb/ubuntu/composer?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59947.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "composer",
"binary_version": "1.10.1-1ubuntu0.1~esm2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "composer",
"purl": "pkg:deb/ubuntu/composer?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59947.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "composer",
"binary_version": "2.2.6-2ubuntu4+esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "composer",
"purl": "pkg:deb/ubuntu/composer?arch=source&distro=esm-apps%2Fnoble",
"ecosystem": "Ubuntu:Pro:24.04:LTS"
},
"versions": [
"2.5.8-1",
"2.6.5-1",
"2.6.6-1",
"2.7.1-2",
"2.7.1-2ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59947.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "composer",
"binary_version": "2.7.1-2ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "composer",
"purl": "pkg:deb/ubuntu/composer?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"2.8.6-1",
"2.8.8-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59947.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "composer",
"binary_version": "2.8.8-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "composer",
"purl": "pkg:deb/ubuntu/composer?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2.9.5-1",
"2.10.1-2",
"2.10.2-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59947.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "composer",
"binary_version": "2.10.2-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "composer",
"purl": "pkg:deb/ubuntu/composer?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"2.8.8-1",
"2.9.5-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59947.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "composer",
"binary_version": "2.9.5-1"
}
]
}
}
],
"modified": "2026-10-17T12:56:00.550344061Z",
"provider": "osv",
"upstream": [
"CVE-2026-59947"
],
"references": [
"https://ubuntu.com/security/CVE-2026-59947",
"https://www.cve.org/CVERecord?id=CVE-2026-59947",
"https://github.com/composer/composer/security/advisories/GHSA-g6xq-892h-64w3"
]
},
"related_cves": [
{
"value": "CVE-2026-59947",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354548,
"published_at": "2026-07-08T20:16:00+00:00"
}