High
bikeshed — security advisory
This affects the package bikeshed before 3.0.0. This can occur when an untrusted source file containing Inline Tag Command metadata is processed. When an arbitrary OS command is executed, the command output would be included in the HTML output.
- Products
- bikeshed
- Affected versions
- 1.53-0ubuntu1, 1.60-0ubuntu1, 1.61-0ubuntu1, 1.62-0ubuntu1, 1.65-0ubuntu1, 1.71-0ubuntu1, 1.72-0ubuntu1, 1.73-0ubuntu1, 1.78-0ubuntu1, 1.78-0ubuntu2
- Fixed versions
- Not specified
- CVEs
- CVE-2021-23422
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:59 UTC · Revision 1
Source evidence
This affects the package bikeshed before 3.0.0. This can occur when an untrusted source file containing Inline Tag Command metadata is processed. When an arbitrary OS command is executed, the command output would be included in the HTML output.
osv:UBUNTU-CVE-2021-23422
bikeshed
Fixed versions: Not specified
bikeshed
Fixed versions: Not specified
bikeshed
Fixed versions: Not specified
bikeshed
Fixed versions: Not specified
bikeshed
Fixed versions: Not specified
bikeshed
Fixed versions: Not specified
bikeshed
Fixed versions: Not specified
bikeshed
Fixed versions: Not specified
Complete source record
{
"id": "18e52e88cf1066f3cc7c2477255d6762ee91adf60013a1b2d31383b50dd21054",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-23422",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2021-23422",
"summary": "This affects the package bikeshed before 3.0.0. This can occur when an untrusted source file containing Inline Tag Command metadata is processed. When an arbitrary OS command is executed, the command output would be included in the HTML output.",
"evidence": "osv:UBUNTU-CVE-2021-23422",
"products": [
{
"name": {
"value": "bikeshed",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.53-0ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.60-0ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.61-0ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.62-0ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.65-0ubuntu1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "bikeshed",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.71-0ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1.72-0ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1.73-0ubuntu1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "bikeshed",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.78-0ubuntu1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "bikeshed",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.78-0ubuntu1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "bikeshed",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.78-0ubuntu1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "bikeshed",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.78-0ubuntu1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "bikeshed",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.78-0ubuntu2",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "bikeshed",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.78-0ubuntu1",
"evidence": "/affected/7/versions"
},
{
"value": "1.78-0ubuntu2",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2021-23422",
"aliases": [
"UBUNTU-CVE-2021-23422"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bikeshed",
"purl": "pkg:deb/ubuntu/bikeshed?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.53-0ubuntu1",
"1.60-0ubuntu1",
"1.61-0ubuntu1",
"1.62-0ubuntu1",
"1.65-0ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23422.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bikeshed",
"binary_version": "1.65-0ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bikeshed",
"purl": "pkg:deb/ubuntu/bikeshed?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.71-0ubuntu1",
"1.72-0ubuntu1",
"1.73-0ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23422.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bikeshed",
"binary_version": "1.73-0ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bikeshed",
"purl": "pkg:deb/ubuntu/bikeshed?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.78-0ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23422.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bikeshed",
"binary_version": "1.78-0ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bikeshed",
"purl": "pkg:deb/ubuntu/bikeshed?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.78-0ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23422.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bikeshed",
"binary_version": "1.78-0ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bikeshed",
"purl": "pkg:deb/ubuntu/bikeshed?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.78-0ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23422.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bikeshed",
"binary_version": "1.78-0ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bikeshed",
"purl": "pkg:deb/ubuntu/bikeshed?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1.78-0ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23422.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bikeshed",
"binary_version": "1.78-0ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bikeshed",
"purl": "pkg:deb/ubuntu/bikeshed?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1.78-0ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23422.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bikeshed",
"binary_version": "1.78-0ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "bikeshed",
"purl": "pkg:deb/ubuntu/bikeshed?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.78-0ubuntu1",
"1.78-0ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23422.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bikeshed",
"binary_version": "1.78-0ubuntu2"
}
]
}
}
],
"modified": "2026-10-17T12:56:19.790296534Z",
"provider": "osv",
"upstream": [
"CVE-2021-23422"
],
"references": [
"https://ubuntu.com/security/CVE-2021-23422",
"https://snyk.io/vuln/SNYK-PYTHON-BIKESHED-1537646",
"https://github.com/tabatkins/bikeshed/commit/b2f668fca204260b1cad28d5078e93471cb6b2dd",
"https://www.cve.org/CVERecord?id=CVE-2021-23422"
]
},
"related_cves": [
{
"value": "CVE-2021-23422",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 355292,
"published_at": "2021-08-16T08:15:00+00:00"
}