CVE-2019-10856
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.
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
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 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 5.8 Medium
AV: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 Medium
CVSS: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 Medium
CVSS: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 Medium
CVSS: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 Medium
CVSS: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 Medium
CVSS: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 Medium
CVSS: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
| Package | Affected | Fixed |
|---|---|---|
notebookPyPI |
before 5.7.8 | 5.7.8 |
notebookPyPI |
before 5.7.8, plus listed versions 0.0.04.0.04.0.14.0.24.0.4 Show 43 moreShow less4.0.54.0.64.1.04.2.04.2.0b14.2.14.2.24.2.34.3.04.3.14.3.24.4.04.4.15.0.05.0.0b15.0.0b25.0.0rc15.0.0rc25.1.05.1.0rc15.1.0rc25.1.0rc35.2.05.2.0rc15.2.15.2.1rc15.2.25.3.05.3.0rc15.3.15.4.05.4.15.5.05.5.0rc15.6.05.6.0rc15.7.05.7.15.7.25.7.35.7.45.7.55.7.6 |
5.7.8 |
jupyter-notebookMageia:8 From an advisory covering 10 CVEs |
before 6.4.12-1.mga8 | 6.4.12-1.mga8 |
python-send2trashMageia:8 From an advisory covering 10 CVEs |
before 1.8.0-1.mga8 | 1.8.0-1.mga8 |
python-nest-asyncioMageia:8 From an advisory covering 10 CVEs |
before 1.5.5-1.mga8 | 1.5.5-1.mga8 |
jupyter-notebookUbuntu: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-notebookUbuntu: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-notebookUbuntu: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-notebookUbuntu:25.10 |
All versions, plus listed versions 6.4.13-56.4.13-5ubuntu0.1 |
None known |
jupyter-notebookUbuntu:26.10 |
All versions, plus listed versions 6.4.13-5ubuntu0.1 |
None known |
Show 4 moreShow less
| Package | Affected | Fixed |
|---|---|---|
jupyter-notebookUbuntu:26.04:LTS |
All versions, plus listed versions 6.4.13-5ubuntu0.1 |
None known |
jupyter-notebookUbuntu: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-notebookUbuntu: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-notebookUbuntu: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
| Recorded | Changed | Sources |
|---|---|---|
| affected | OSV | |
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE 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
blog.jupyter.org/open-redirect-vulnerability-in-jupyter-jupyterhub-adf43583f1e4
github.com/jupyter/notebook/compare/16cf97c...b8e30ea
nvd.nist.gov/vuln/detail/CVE-2019-10856
github.com/jupyter/notebook/commit/979e0bd15e794ceb00cc63737fcd5fd9addc4a99
github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2019-158.yaml
github.com/advisories/GHSA-rcx2-m7jp-p9wj
Show 17 moreShow less
github.com/jupyter/notebook
advisories.mageia.org/MGASA-2022-0323.html
bugs.mageia.org/show_bug.cgi?id=30789
bugs.mageia.org/show_bug.cgi?id=30664
ubuntu.com/security/notices/USN-5585-1
github.com/jupyter/notebook/security/advisories/GHSA-m87f-39q9-6f55
github.com/jupyter/notebook/security/advisories/GHSA-v7vq-3x77-87vg
lists.fedoraproject.org/archives/list/[email protected]/thread/ORJX2LF6KMPIHP6B2P6KZIVKMLE3LVJ5
ubuntu.com/security/CVE-2019-10856
cve.org/CVERecord?id=CVE-2019-10856
ubuntu.com/security/CVE-2018-19351
ubuntu.com/security/CVE-2018-21030
ubuntu.com/security/CVE-2019-9644
ubuntu.com/security/CVE-2019-10255
ubuntu.com/security/CVE-2020-26215
ubuntu.com/security/CVE-2022-24758
ubuntu.com/security/CVE-2022-29238