CVE-2026-108752: Software Security Vulnerability Vulnerability

LOW
Advisory Identifier: GHSA-h63v-vvgj-vrfh
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CVSS 4.2
CWE-694
Published
Advisory Summary

CVE-2026-108752 is a LOW (CVSS 4.2) security vulnerability vulnerability (CWE-694: Use of Multiple Resources with Duplicate Identifier) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses multiple resources that can have the same identifier, in a context in which unique identifiers are required.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-108752 at a Glance

CVE Identifier CVE-2026-108752
GHSA Identifier GHSA-h63v-vvgj-vrfh
Severity LOW
CVSS v3.1 Base Score 4.2
CWE Classification CWE-694: Use of Multiple Resources with Duplicate Identifier
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.2

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-108752

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-108752, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-694: Use of Multiple Resources with Duplicate Identifier, where the product uses multiple resources that can have the same identifier, in a context in which unique identifiers are required. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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

NVD — CVE-2026-108752 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-108752
Software Source Repository REPOSITORY
https://github.com/jupyterhub/jupyterhub
Software Source Repository REPOSITORY
https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/oauth/provider.py#L719-L754
Software Source Repository REPOSITORY
https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/user.py#L1174-L1186
Software Source Repository REPOSITORY
https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/user.py#L563-L567
hackmd.io/@haind/jupyterhub-o... WEB
https://hackmd.io/@haind/jupyterhub-oauth-client-id-cross-user-collision
www.vulncheck.com/advisories/jupyterh... WEB
https://www.vulncheck.com/advisories/jupyterhub-through-6.0.1-oauth-client-id-collision-via-unescaped-hyphen

Frequently Asked Questions

What is CVE-2026-108752?
CVE-2026-108752 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-694: Use of Multiple Resources with Duplicate Identifier.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-108752?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-108752?
CVE-2026-108752 has a CVSS v3.1 base score of 4.2 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L.
What CWE is associated with CVE-2026-108752?
CVE-2026-108752 is classified under CWE-694: Use of Multiple Resources with Duplicate Identifier (The product uses multiple resources that can have the same identifier, in a context in which unique identifiers are required.).
How can I check Maven dependencies for CVE-2026-108752?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-h63v-vvgj-vrfh",
  "modified" : "2026-10-11T15:31:05Z",
  "published" : "2026-10-11T15:31:05Z",
  "aliases" : [ "CVE-2026-108752" ],
  "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-108752"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jupyterhub/jupyterhub"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/oauth/provider.py#L719-L754"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/user.py#L1174-L1186"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/user.py#L563-L567"
  }, {
    "type" : "WEB",
    "url" : "https://hackmd.io/@haind/jupyterhub-oauth-client-id-cross-user-collision"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/jupyterhub-through-6.0.1-oauth-client-id-collision-via-unescaped-hyphen"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-694" ],
    "severity" : "LOW",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-11T13:17:20Z"
  }
}