CVE-2021-39159 - CVE House
Back to Database
Status published Critical CVE-2021-39159

Remote code execution in Binderhub

Vulnerability Description

BinderHub is a kubernetes-based cloud service that allows users to share reproducible interactive computing environments from code repositories. In affected versions a remote code execution vulnerability has been identified in BinderHub, where providing BinderHub with maliciously crafted input could execute code in the BinderHub context, with the potential to egress credentials of the BinderHub deployment, including JupyterHub API tokens, kubernetes service accounts, and docker registry credentials. This may provide the ability to manipulate images and other user created pods in the deployment, with the potential to escalate to the host depending on the underlying kubernetes configuration. Users are advised to update to version 0.2.0-n653. If users are unable to update they may disable the git repo provider by specifying the `BinderHub.repo_providers` as a workaround.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-39159

Credits & Attribution

No credits recorded in the NVD database.

References

More from jupyterhub

View All →
CVE-2025-32428
Jupyter Remote Desktop Proxy makes TigerVNC accessible via the network and not just via a UNIX socket as intended
Critical 9
CVE-2024-41942
JupyterHub has a privilege escalation vulnerability with the `admin:users` scope
High 7.2
CVE-2024-37300
Globus `identity_provider` restriction ignored when used with `allow_all` in JupyterHub 5.0
High 8.1
CVE-2024-35225
Jupyter Server Proxy has a reflected XSS issue in host parameter
Critical 9.7
CVE-2024-29033
GoogleOAuthenticator.hosted_domain incorrectly verifies membership of an Google organization/workspace
High 7.5

Affected Vendor

Affected Software

binderhub
Vulnerable Versions:
< 0.2.0-n653

Timeline

Official Publish: August 25th, 2021
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weaknesses (CWE)

CWE-94

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1059 Command and Scripting Interpreter
Execution
T1505.003 Web Shell
Persistence
T1105 Ingress Tool Transfer
Command and Control
T1565.002 Stored Data Manipulation
Impact