UBUNTU-CVE-2026-108752

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Source
https://ubuntu.com/security/CVE-2026-108752
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-108752.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-108752
Upstream
Published
2026-10-13T00:00:00Z
Modified
2026-10-14T03:22:50Z
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
  • 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
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

Ubuntu:22.04:LTS / jupyterhub

Package

Name
jupyterhub
Purl
pkg:deb/ubuntu/jupyterhub?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.0.0+ds1-1
2.0.0+ds1-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "jupyterhub",
            "binary_version":  "2.0.0+ds1-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-108752.json"

Ubuntu:24.04:LTS / jupyterhub

Package

Name
jupyterhub
Purl
pkg:deb/ubuntu/jupyterhub?arch=source&distro=noble

Affected ranges

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

Affected versions

3.*
3.0.0+ds1-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "jupyterhub",
            "binary_version":  "3.0.0+ds1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-108752.json"

Ubuntu:26.04:LTS / jupyterhub

Package

Name
jupyterhub
Purl
pkg:deb/ubuntu/jupyterhub?arch=source&distro=resolute

Affected ranges

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

Affected versions

5.*
5.2.1+ds1-4

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "jupyterhub",
            "binary_version":  "5.2.1+ds1-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-108752.json"