CVE-2026-54338

mediumPriorität · verfolgen · 0EPSS 0.004 · 38. PerzentilEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.44% (38th) EPSS
CVSS 5.3 · medium
Is it mine?
3 products
Prüfe deine Angriffsfläche
Who says so?
3 sources
cnnvd · enisa_euvd · osv

EPSS · bewertet 2026-10-29

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.

01

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

5.3
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · security-advisories@github.comAusnutzbarkeit 3.9 · Auswirkung 1.4
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · OSV
v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)
02

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
03

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-400USCWE-400US
04

betroffene Produkte (3)

Betroffene Produkte und Versionsbereiche.

  • jupyterhub jupyterhub≤ < 5.5.0JupyterHub 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.enisa_euvdEU
  • Bitnami jupyterhub< 5.5.0osvUSpkg:bitnami/jupyterhub
  • PyPI jupyterhub< 5.5.0osvUSpkg:pypi/jupyterhub
05

Advisories (3)

Hersteller- und Ökosystem-Meldungen dazu.

  • GHSA-p43p-whwx-q52hJupyterHub has Unauthenticated Denial of Service via Unbounded Username Logging on Failed Login2026-08-25ghsa · osvUS

    ### 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.

  • BIT-jupyterhub-2026-54338JupyterHub: Unauthenticated Denial of Service via Unbounded Username Logging on Failed Login2026-09-29vendor · osvUS

    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.

  • PYSEC-2026-3853JupyterHub has Unauthenticated Denial of Service via Unbounded Username Logging on Failed Login2026-09-10vendor · osvUS

    ### 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.

06

auch bekannt als (5)

Weitere Namen und Kennungen dieser Entität.

07

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvdenisa_euvdosvNVDCVE.orgMITRE
veröffentlicht 2026-08-07geändert 2026-08-11
08

Referenzen (6)

Externe Belege — Patches, Meldungen, Analysen.

scry

Angreifer nutzen Schwachstellen wie diese gegen im Internet exponierte Dienste aus. Sehen Sie mit einem kostenlosen Passiv-Scan, was exponiert ist.

Kostenloser Scan