Medium
jupyterhub — security advisory
JupyterHub 1.1.0 allows CSRF in the admin panel via a request that lacks an _xsrf field, as demonstrated by a /hub/api/user request (to add or remove a user account).
- Products
- jupyterhub
- Affected versions
- 2.0.0+ds1-1, 2.0.0+ds1-2, 3.0.0+ds1-1, 5.2.1+ds1-2, 5.2.1+ds1-3, 5.2.1+ds1-4, 5.2.1+ds1-5
- Fixed versions
- Not specified
- CVEs
- CVE-2020-36191
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:52 UTC · Revision 1
Source evidence
JupyterHub 1.1.0 allows CSRF in the admin panel via a request that lacks an _xsrf field, as demonstrated by a /hub/api/user request (to add or remove a user account).
osv:UBUNTU-CVE-2020-36191
jupyterhub
Fixed versions: Not specified
jupyterhub
Fixed versions: Not specified
jupyterhub
Fixed versions: Not specified
jupyterhub
Fixed versions: Not specified
jupyterhub
Fixed versions: Not specified
Complete source record
{
"id": "1eef3704fc060d212953fe5a757fbeff0ceac07ff01a405f29c353955338d206",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-36191",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2020-36191",
"summary": "JupyterHub 1.1.0 allows CSRF in the admin panel via a request that lacks an _xsrf field, as demonstrated by a /hub/api/user request (to add or remove a user account).",
"evidence": "osv:UBUNTU-CVE-2020-36191",
"products": [
{
"name": {
"value": "jupyterhub",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.0+ds1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.0+ds1-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "jupyterhub",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.0.0+ds1-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "jupyterhub",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2.1+ds1-2",
"evidence": "/affected/2/versions"
},
{
"value": "5.2.1+ds1-3",
"evidence": "/affected/2/versions"
},
{
"value": "5.2.1+ds1-4",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "jupyterhub",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2.1+ds1-4",
"evidence": "/affected/3/versions"
},
{
"value": "5.2.1+ds1-5",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "jupyterhub",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2.1+ds1-4",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2020-36191",
"aliases": [
"UBUNTU-CVE-2020-36191"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jupyterhub",
"purl": "pkg:deb/ubuntu/jupyterhub?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.0.0+ds1-1",
"2.0.0+ds1-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36191.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "jupyterhub",
"binary_version": "2.0.0+ds1-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jupyterhub",
"purl": "pkg:deb/ubuntu/jupyterhub?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"3.0.0+ds1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36191.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "jupyterhub",
"binary_version": "3.0.0+ds1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jupyterhub",
"purl": "pkg:deb/ubuntu/jupyterhub?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"5.2.1+ds1-2",
"5.2.1+ds1-3",
"5.2.1+ds1-4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36191.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "jupyterhub",
"binary_version": "5.2.1+ds1-4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jupyterhub",
"purl": "pkg:deb/ubuntu/jupyterhub?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"5.2.1+ds1-4",
"5.2.1+ds1-5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36191.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "jupyterhub",
"binary_version": "5.2.1+ds1-5"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jupyterhub",
"purl": "pkg:deb/ubuntu/jupyterhub?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"5.2.1+ds1-4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36191.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "jupyterhub",
"binary_version": "5.2.1+ds1-4"
}
]
}
}
],
"modified": "2026-10-17T12:56:13.985012426Z",
"provider": "osv",
"upstream": [
"CVE-2020-36191"
],
"references": [
"https://ubuntu.com/security/CVE-2020-36191",
"https://github.com/jupyterhub/jupyterhub/issues/3304",
"https://www.cve.org/CVERecord?id=CVE-2020-36191"
]
},
"related_cves": [
{
"value": "CVE-2020-36191",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354987,
"published_at": "2021-01-13T04:15:00+00:00"
}