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CVE-2019-10255 Moderate

Open Redirect vulnerability in jupyterhub and notebook

An Open Redirect vulnerability for all browsers in Jupyter Notebook before 5.7.8 and some browsers (Chrome, Firefox) in JupyterHub before 0.9.6 allows crafted links to the login page, which will redirect to a malicious site after successful login. Servers running on a base_url prefix are not affected.

Exploit probability 1.7%
Published July 2, 2026
Required by Not available
Last source change July 13, 2026

02 / AFFECTED SOFTWARE

Affected packages

PyPI jupyterhub

31 explicit affected versions

PyPI notebook

48 explicit affected versions

PyPI notebook

48 explicit affected versions

PyPI jupyterhub

31 explicit affected versions

Unknown Unknown

57 explicit affected versions

03 / CONNECTIONS

Connected vulnerabilities

04 / EVIDENCE

Source records

Open Source Vulnerabilities GHSA-rv62-4pmj-xw6h

An Open Redirect vulnerability for all browsers in Jupyter Notebook before 5.7.8 and some browsers (Chrome, Firefox) in JupyterHub before 0.9.6 allows crafted links to the login page, which will redirect to a malicious site after successful login. Servers running on a base_url prefix are not affected.

View original source
Open Source Vulnerabilities PYSEC-2026-647

An Open Redirect vulnerability for all browsers in Jupyter Notebook before 5.7.8 and some browsers (Chrome, Firefox) in JupyterHub before 0.9.6 allows crafted links to the login page, which will redirect to a malicious site after successful login. Servers running on a base_url prefix are not affected.

View original source
Open Source Vulnerabilities PYSEC-2026-2683

An Open Redirect vulnerability for all browsers in Jupyter Notebook before 5.7.8 and some browsers (Chrome, Firefox) in JupyterHub before 0.9.6 allows crafted links to the login page, which will redirect to a malicious site after successful login. Servers running on a base_url prefix are not affected.

View original source
Open Source Vulnerabilities CVE-2019-10255

An Open Redirect vulnerability for all browsers in Jupyter Notebook before 5.7.7 and some browsers (Chrome, Firefox) in JupyterHub before 0.9.5 allows crafted links to the login page, which will redirect to a malicious site after successful login. Servers running on a base_url prefix are not affected.

View original source

05 / REFERENCES

Further evidence