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MEDIUM

CVE-2019-10856

CVSS v3

6.1

MEDIUM

EPSS Score

1.3 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • notebookPyPIall versions · fixed in 5.7.8

Vendor advisories

  • CVE-2019-10856 Red Hat Product Security

    python-notebook: open redirect vulnerability by an empty netloc

Full record on NVD

Description

In Jupyter Notebook before 5.7.8, an open redirect can occur via an empty netloc. This issue exists because of an incomplete fix for CVE-2019-10255.

Technical details

Published
2019-04-04

Frequently asked questions

What is CVE-2019-10856?

In Jupyter Notebook before 5.7.8, an open redirect can occur via an empty netloc. This issue exists because of an incomplete fix for CVE-2019-10255.

Is CVE-2019-10856 actively exploited?

Active exploitation of CVE-2019-10856 has not been confirmed. Its EPSS score was 1.3% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-10856?

CVE-2019-10856 has a CVSS v3 base score of 6.1 (MEDIUM severity).

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