DEBIAN-CVE-2026-108752

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Source
https://security-tracker.debian.org/tracker/CVE-2026-108752
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-108752.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-108752
Upstream
Published
2026-10-11T13:17:20Z
Modified
2026-10-12T08:00:07Z
Severity
  • 4.2 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
Summary
[none]
Details

JupyterHub through 6.0.1 contains an identifier collision vulnerability that allows authenticated users to overwrite another user's named-server OAuth client by registering a hyphenated username. Attackers holding a name like alice-prod can overwrite the client for alice's server prod, breaking OAuth login and revoking tokens by stopping their own server.

References

Affected packages

Debian:12 / jupyterhub

Package

Name
jupyterhub
Purl
pkg:deb/debian/jupyterhub?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.0.0+ds1-1
5.*
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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-108752.json"

Debian:13 / jupyterhub

Package

Name
jupyterhub
Purl
pkg:deb/debian/jupyterhub?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.2.1+ds1-4
5.2.1+ds1-5

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-108752.json"

Debian:14 / jupyterhub

Package

Name
jupyterhub
Purl
pkg:deb/debian/jupyterhub?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.2.1+ds1-4
5.2.1+ds1-5

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-108752.json"