DEBIAN-CVE-2026-54338
JupyterHub is software that allows users to create a multi-user server for Jupyter notebooks. Prior to 5.5.0, invalid input to form-based login authenticators can place an unbounded attacker-controlled username in failed-login logs, allowing an unauthenticated attacker to consume logging and storage resources. This issue is fixed in version 5.5.0.
DEBIAN-CVE-2026-54338
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-54338
jupyterhub
Source reference: /affected/0/package/name
- Affected versions
- 3.0.0+ds1-1
Source reference:
/affected/0/versions5.0.0+ds1-1Source reference:
/affected/0/versions5.0.0+ds1-2Source reference:
/affected/0/versions5.0.0+ds1-3Source reference:
/affected/0/versions5.0.0+ds1-4Source reference:
/affected/0/versions5.2.1+ds1-1Source reference:
/affected/0/versions5.2.1+ds1-2Source reference:
/affected/0/versions5.2.1+ds1-3Source reference:
/affected/0/versions5.2.1+ds1-4Source reference:
/affected/0/versions5.2.1+ds1-5Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
jupyterhub
Source reference: /affected/1/package/name
- Affected versions
- 5.2.1+ds1-4
Source reference:
/affected/1/versions5.2.1+ds1-5Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
jupyterhub
Source reference: /affected/2/package/name
- Affected versions
- 5.2.1+ds1-4
Source reference:
/affected/2/versions5.2.1+ds1-5Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jupyterhub",
"purl": "pkg:deb/debian/jupyterhub?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.0.0+ds1-1",
"5.0.0+ds1-1",
"5.0.0+ds1-2",
"5.0.0+ds1-3",
"5.0.0+ds1-4",
"5.2.1+ds1-1",
"5.2.1+ds1-2",
"5.2.1+ds1-3",
"5.2.1+ds1-4",
"5.2.1+ds1-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54338.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jupyterhub",
"purl": "pkg:deb/debian/jupyterhub?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"5.2.1+ds1-4",
"5.2.1+ds1-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54338.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jupyterhub",
"purl": "pkg:deb/debian/jupyterhub?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"5.2.1+ds1-4",
"5.2.1+ds1-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54338.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57810 · Revision 1
- Added to Heist Feed
- Publisher date