GHSA-p43p-whwx-q52h

Source

https://github.com/advisories/GHSA-p43p-whwx-q52h

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-p43p-whwx-q52h/GHSA-p43p-whwx-q52h.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-p43p-whwx-q52h

Aliases

Published

2026-08-25T19:29:19Z

Modified

2026-09-10T12:25:49Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator

Summary

JupyterHub has Unauthenticated Denial of Service via Unbounded Username Logging on Failed Login

Details

Impact

Invalid input to login resulted in unbounded logging output. Only form-based Authenticators (the default PAM Authenticator, but not the more widely used OAuthenticator) are affected.

Patches

Upgrade to 5.5.0.

Workarounds

Use an Authenticator that doesn't use a login form, such as OAuthenticator.

Database specific

{
    "cwe_ids":  [
        "CWE-400"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-08-25T19:29:19Z",
    "nvd_published_at":  "2026-08-07T21:17:29Z",
    "severity":  "MODERATE"
}

References

Affected packages

PyPI / jupyterhub

Package

Name: jupyterhub; View open source insights on deps.dev
Purl: pkg:pypi/jupyterhub

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

5.5.0

Affected versions

0.*

0.1.0

0.2.0

0.3.0

0.4.0

0.4.1

0.5.0

0.6.0

0.6.1

0.7.0b1

0.7.0

0.7.1

0.7.2

0.8.0b1

0.8.0b2

0.8.0b3

0.8.0b4

0.8.0b5

0.8.0rc1

0.8.0rc2

0.8.0

0.8.1

0.9.0b1

0.9.0b2

0.9.0b3

0.9.0rc1

0.9.0

0.9.1

0.9.2

0.9.3

0.9.4

0.9.5

0.9.6

1.*

1.0.0b1

1.0.0b2

1.0.0

1.1.0b1

1.1.0

1.2.0b1

1.2.0

1.2.1

1.2.2

1.3.0

1.4.0

1.4.1

1.4.2

1.5.0

1.5.1

2.*

2.0.0b1

2.0.0b2

2.0.0b3

2.0.0rc1

2.0.0rc2

2.0.0rc3

2.0.0rc4

2.0.0rc5

2.0.0

2.0.1

2.0.2

2.1.0

2.1.1

2.2.0

2.2.1

2.2.2

2.3.0

2.3.1

3.*

3.0.0b1

3.0.0

3.1.0

3.1.1

4.*

4.0.0b1

4.0.0b2

4.0.0

4.0.1

4.0.2

4.1.0

4.1.1

4.1.2

4.1.3

4.1.4

4.1.5

4.1.6

5.*

5.0.0b1

5.0.0b2

5.0.0

5.1.0

5.2.0

5.2.1

5.3.0rc0

5.3.0

5.4.0

5.4.1

5.4.2

5.4.3

5.4.4

5.4.5

5.4.6

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-p43p-whwx-q52h/GHSA-p43p-whwx-q52h.json"