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CVE-2025-61669

jupyter_server next parameter open redirect can redirect users to external domains

Published: May 5, 2026Updated: May 11, 2026 Sources: CVE List NVDCWE-601
NVD MITRE
6.1CVSSMEDIUM
EPSS Score
0.3%
Top 82.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Jupyter Server is the backend for Jupyter web applications. In jupyter_server versions through 2.17.0, the next query parameter in the login flow is insufficiently validated in `LoginFormHandler._redirect_safe()`, which allows redirects to arbitrary external domains via values such as `///example.com`. An attacker can use a crafted login URL to redirect users to a malicious site and facilitate phishing attacks. This issue is fixed in version 2.18.0.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-601

Affected Products

jupyter_serverjupyter-server
On-prem
AI / ML / notebook-mlops
jupyter serverjupyter
Mixed
AI / ML / notebook-mlops
jupyter-serveross-projectUSAI / MLaka jupyter_server, jupyter-scheduler
jupyteross-projectAI / MLaka notebook, jupyter server, jupyterlab

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-qh7q-6qm3-653w
github.com

Timeline

Published
May 5, 2026
Last Updated
May 11, 2026

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