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CVE-2019-10856

Jupyter Notebook open redirect vulnerability

6.1 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

1.26%Up 0.6 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.1

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.

Record
CVE-2019-10856
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0
5.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:N
Weakness
CWE-601
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2019-10856
Updated
2026-11-02
EUVDEUVD-2019-0094 No score

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.

Record
EUVD-2019-0094
Updated
2026-11-03
GitHub AdvisoriesGHSA-rcx2-m7jp-p9wj 5.3

Jupyter Notebook open redirect vulnerability

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.

Record
GHSA-rcx2-m7jp-p9wj
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-601
Updated
2026-11-02
OSV 6.1

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.

Record
CVE-2019-10856
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVGHSA-rcx2-m7jp-p9wj 5.3

Jupyter Notebook open redirect vulnerability

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.

Record
GHSA-rcx2-m7jp-p9wj
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-601
Updated
2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2019-10856 6.1

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.

Record
UBUNTU-CVE-2019-10856
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-06
OSVMGASA-2022-0323 No score

Updated jupyter-notebook packages fix security vulnerability

It was discovered that Jupyter Notebook incorrectly handled certain notebooks. An attacker could possibly use this issue of lack of Content Security Policy in Nbconvert to perform cross-site scripting (XSS) attacks on the notebook server. (CVE-2018-19351)

It was discovered that Jupyter Notebook incorrectly handled certain SVG documents. An attacker could possibly use this issue to perform cross-site scripting (XSS) attacks. (CVE-2018-21030)

It was discovered that Jupyter Notebook incorrectly filtered certain URLs on the login page. An attacker could possibly use this issue to perform open-redirect attack. (CVE-2019-10255)

It was discovered that Jupyter Notebook had an incomplete fix for CVE-2019-10255. An attacker could possibly use this issue to perform open-redirect attack using empty netloc. (CVE-2019-10856)

It was discovered that Jupyter Notebook incorrectly handled the inclusion of remote pages on Jupyter server. An attacker could possibly use this issue to perform cross-site script inclusion (XSSI) attacks. (CVE-2019-9644)

It was discovered that Jupyter Notebook incorrectly filtered certain URLs to a notebook. An attacker could possibly use this issue to perform open-redirect attack. (CVE-2020-26215)

It was discovered that Jupyter Notebook server access logs were not protected. An attacker having access to the notebook server could possibly use this issue to get access to steal sensitive information such as auth/cookies. (CVE-2022-24758)

It was discovered that Jupyter Notebook incorrectly configured hidden files on the server. An authenticated attacker could possibly use this issue to see unwanted sensitive hidden files from the server which may result in getting full access to the server. (CVE-2022-29238)

Moment.js: Path traversal in moment.locale (CVE-2022-24785)

moment: inefficient parsing algorithim resulting in DoS (CVE-2022-31129)

Record
MGASA-2022-0323
Updated
2026-11-02
OSVPYSEC-2019-158 No score

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.

Record
PYSEC-2019-158
Updated
2026-11-02
OSVUSN-5585-1 No score

jupyter-notebook vulnerabilities

It was discovered that Jupyter Notebook incorrectly handled certain notebooks. An attacker could possibly use this issue of lack of Content Security Policy in Nbconvert to perform cross-site scripting (XSS) attacks on the notebook server. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-19351)

It was discovered that Jupyter Notebook incorrectly handled certain SVG documents. An attacker could possibly use this issue to perform cross-site scripting (XSS) attacks. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-21030)

It was discovered that Jupyter Notebook incorrectly filtered certain URLs on the login page. An attacker could possibly use this issue to perform open-redirect attack. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-10255)

It was discovered that Jupyter Notebook had an incomplete fix for CVE-2019-10255. An attacker could possibly use this issue to perform open-redirect attack using empty netloc. (CVE-2019-10856)

It was discovered that Jupyter Notebook incorrectly handled the inclusion of remote pages on Jupyter server. An attacker could possibly use this issue to perform cross-site script inclusion (XSSI) attacks. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-9644)

It was discovered that Jupyter Notebook incorrectly filtered certain URLs to a notebook. An attacker could possibly use this issue to perform open-redirect attack. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-26215)

It was discovered that Jupyter Notebook server access logs were not protected. An attacker having access to the notebook server could possibly use this issue to get access to steal sensitive information such as auth/cookies. (CVE-2022-24758)

It was discovered that Jupyter Notebook incorrectly configured hidden files on the server. An authenticated attacker could possibly use this issue to see unwanted sensitive hidden files from the server which may result in getting full access to the server. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2022-29238)

Record
USN-5585-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
notebook
PyPI
before 5.7.8
5.7.8
notebook
PyPI
before 5.7.8, plus listed versions
0.0.04.0.04.0.14.0.24.0.4
Show 43 moreShow less
4.0.54.0.64.1.04.2.04.2.0b14.2.14.2.24.2.34.3.04.3.14.3.24.4.04.4.15.0.05.0.0b15.0.0b25.0.0rc15.0.0rc25.1.05.1.0rc15.1.0rc25.1.0rc35.2.05.2.0rc15.2.15.2.1rc15.2.25.3.05.3.0rc15.3.15.4.05.4.15.5.05.5.0rc15.6.05.6.0rc15.7.05.7.15.7.25.7.35.7.45.7.55.7.6
5.7.8
jupyter-notebook
Mageia:8
From an advisory covering 10 CVEs
before 6.4.12-1.mga8
6.4.12-1.mga8
python-send2trash
Mageia:8
From an advisory covering 10 CVEs
before 1.8.0-1.mga8
1.8.0-1.mga8
python-nest-asyncio
Mageia:8
From an advisory covering 10 CVEs
before 1.5.5-1.mga8
1.5.5-1.mga8
jupyter-notebook
Ubuntu:18.04:LTS
before 5.2.2-1ubuntu0.1, plus listed versions
4.2.3-45.1.0-25.2.1-25.2.2-1
5.2.2-1ubuntu0.1
jupyter-notebook
Ubuntu:20.04:LTS
before 6.0.3-2ubuntu0.1, plus listed versions
5.7.8-16.0.0-16.0.0-26.0.2-16.0.3-16.0.3-2
6.0.3-2ubuntu0.1
jupyter-notebook
Ubuntu:22.04:LTS
before 6.4.8-1ubuntu0.1, plus listed versions
6.2.0-16.4.5-26.4.5-36.4.5-46.4.8-1
6.4.8-1ubuntu0.1
jupyter-notebook
Ubuntu:25.10
All versions, plus listed versions
6.4.13-56.4.13-5ubuntu0.1
None known
jupyter-notebook
Ubuntu:26.10
All versions, plus listed versions
6.4.13-5ubuntu0.1
None known
Show 4 moreShow less
Affected packages
PackageAffectedFixed
jupyter-notebook
Ubuntu:26.04:LTS
All versions, plus listed versions
6.4.13-5ubuntu0.1
None known
jupyter-notebook
Ubuntu:18.04:LTS
From an advisory covering 8 CVEs
before 5.2.2-1ubuntu0.1, plus listed versions
4.2.3-45.1.0-25.2.1-25.2.2-1
5.2.2-1ubuntu0.1
jupyter-notebook
Ubuntu:20.04:LTS
From an advisory covering 8 CVEs
before 6.0.3-2ubuntu0.1, plus listed versions
5.7.8-16.0.0-16.0.0-26.0.2-16.0.3-16.0.3-2
6.0.3-2ubuntu0.1
jupyter-notebook
Ubuntu:22.04:LTS
From an advisory covering 8 CVEs
before 6.4.8-1ubuntu0.1, plus listed versions
6.2.0-16.4.5-26.4.5-36.4.5-46.4.8-1
6.4.8-1ubuntu0.1

History

History
RecordedChangedSources
affectedOSV
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-10856 is a medium vulnerability (CVSS 6.1) in Jupyter Notebook, published April 4, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.26%, the 69th percentile. Fixed in notebook 5.7.8.

References

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