TI-2025-38102 Aliases CVE-2025-61669 GHSA-qh7q-6qm3-653w

jupyter_server next parameter open redirect can redirect users to external domains

MEDIUM 61CWE-601Published 2026-05-05 · Updated 2026-05-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Spoofing
Confidentiality · integrity · availability: None · None · None
Fix status: Partial Red Hat: 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-601.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00244 15th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Partial jupyter-server (PyPI): 2.18.0Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
jupyterlab	jupyter_server	up to 2.17.0	—	No fix listed	CNA
—	jupyter-server (PyPI)	before 2.18.0	2.18.0	Patch available	GHSA-qh7q-6qm3-653w

jupyter_server Vendorjupyterlab Affected up to 2.17.0 Fixed in — No fix listed CNA
jupyter-server (PyPI) Vendor— Affected before 2.18.0 Fixed in 2.18.0 Patch available GHSA-qh7q-6qm3-653w

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:jupyter:jupyter_server::::::::	before 2.18.0	Vulnerable	jupyterlab

cpe:2.3:a:jupyter:jupyter_server:*:*:*:*:*:*:*:* Versions before 2.18.0 Vulnerable ·jupyterlab

Remediation

Fix · GHSA-qh7q-6qm3-653w jupyter-server (PyPI) Fixed in 2.18.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Migration Toolkit for Applications 8	Affected	No fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2025-61669
2026-10-03 Alias added: GHSA-qh7q-6qm3-653w

References

Exploit 1

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

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2025-61669

Other 2

TI-2026-05842 CORS Origin Validation Bypass in jupyter-server CVSS 3.1HIGH 8.8
TI-2026-04748 Path Traversal in jupyter/jupyter CVSS 3.1HIGH 8.1
TI-2026-27533 jupyter-server path traversal allows access to sibling directories sharing root_dir name prefix CVSS 4.0HIGH 7.6
TI-2026-32614 Jupyter Server: Stored XSS in `NbconvertFileHandler` / `NbconvertPostHandler` via missing `sandbox` CSP CVSS 4.0CRITICAL 9.3
TI-2024-23252 Jupyter server on Windows discloses Windows user password hash CVSS 3.1HIGH 7.5
TI-2022-11782 Known or guessable hidden files may be accessed in Jupyter Server CVSS 3.1HIGH 8.8

See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences