Open redirect in Jupyter Server - CVE-2020-26275
Published: December 16, 2020 / Updated: May 5, 2026
Vulnerability identifier: #VU130159
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-26275
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Jupyter
Affected software:
Jupyter Server
Jupyter Server
Detailed vulnerability description
The vulnerability allows a remote attacker to redirect users to an arbitrary website.
The vulnerability exists due to improper control of a resource through its lifetime in redirect handling in jupyter server when processing a maliciously crafted link. A remote attacker can send a specially crafted link to redirect users to an arbitrary website.
All jupyter servers running without a base_url prefix are affected.
How to mitigate CVE-2020-26275
Install security update from vendor's website.