PYSEC-2026-2538 Jupyter Notebook Vulnerable to Authentication Token Theft via CommandLinker XSS

Impact A stored Cross-Site Scripting XSS vulnerability in Jupyter Notebook allows attackers to steal authentication tokens from users who open malicious notebook files and interact with elements that the attacker can make look indistinguishable from legitimate controls single click interaction. T...

PYSEC-2026-2682 Jupyter Notebook Vulnerable to Authentication Token Theft via CommandLinker XSS

Impact A stored Cross-Site Scripting XSS vulnerability in Jupyter Notebook allows attackers to steal authentication tokens from users who open malicious notebook files and interact with elements that the attacker can make look indistinguishable from legitimate controls single click interaction. T...

PYSEC-2026-2536 HTML injection in Jupyter Notebook and JupyterLab leading to DOM Clobbering

Impact The vulnerability depends on user interaction by opening a malicious notebook with Markdown cells, or Markdown file using JupyterLab preview feature. A malicious user can access any data that the attacked user has access to as well as perform arbitrary requests acting as the attacked user...

PYSEC-2026-2531 Improper Neutralization of Input During Web Page Generation in Jupyter Notebook

An XSSI cross-site inclusion vulnerability in Jupyter Notebook before 5.7.6 allows inclusion of resources on malicious pages when visited by users who are authenticated with a Jupyter server. Access to the content of resources has been demonstrated with Internet Explorer through capturing of erro...

PYSEC-2026-2683 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 baseurl prefix are not affecte...

HTML injection in Jupyter Notebook and JupyterLab leading to DOM Clobbering

ImpactThe vulnerability depends on user interaction by opening a malicious notebook with Markdown cells, or Markdown file using JupyterLab preview feature.A malicious user can access any data that the attacked user has access to as well as perform arbitrary requests acting as the attacked user...

PYSEC-2026-1481 HTML injection in Jupyter Notebook and JupyterLab leading to DOM Clobbering

Impact The vulnerability depends on user interaction by opening a malicious notebook with Markdown cells, or Markdown file using JupyterLab preview feature. A malicious user can access any data that the attacked user has access to as well as perform arbitrary requests acting as the attacked user...

PYSEC-2026-647 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 baseurl prefix are not affecte...

GO-2026-5103 Gogs's Unauthenticated Jupyter Notebook (ipynb) Sanitizer allows arbitrary data: URIs leading to XSS in gogs.io/gogs

Gogs's Unauthenticated Jupyter Notebook ipynb Sanitizer allows arbitrary data: URIs leading to XSS in gogs.io/gogs. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive repor...

CVE-2026-52816

Gogs is an open source self-hosted Git service. Prior to 0.14.3, the Jupyter Notebook ipynb sanitizer endpoint at POST /-/api/sanitizeipynb allows arbitrary data: URIs without proper restrictions, potentially leading to Cross-Site Scripting XSS. The endpoint uses bluemonday.UGCPolicy with...

CVE-2026-52816 Gogs: Unauthenticated Jupyter Notebook (ipynb) Sanitizer allows arbitrary data: URIs leading to XSS

Gogs is an open source self-hosted Git service. Prior to 0.14.3, the Jupyter Notebook ipynb sanitizer endpoint at POST /-/api/sanitizeipynb allows arbitrary data: URIs without proper restrictions, potentially leading to Cross-Site Scripting XSS. The endpoint uses bluemonday.UGCPolicy with...

CVE-2026-52816 Gogs: Unauthenticated Jupyter Notebook (ipynb) Sanitizer allows arbitrary data: URIs leading to XSS

Gogs is an open source self-hosted Git service. Prior to 0.14.3, the Jupyter Notebook ipynb sanitizer endpoint at POST /-/api/sanitizeipynb allows arbitrary data: URIs without proper restrictions, potentially leading to Cross-Site Scripting XSS. The endpoint uses bluemonday.UGCPolicy with...

Gogs's Unauthenticated Jupyter Notebook (ipynb) Sanitizer allows arbitrary data: URIs leading to XSS

Summary The Jupyter Notebook ipynb sanitizer endpoint at POST /-/api/sanitizeipynb allows arbitrary data: URIs without proper restrictions, potentially leading to Cross-Site Scripting XSS. The endpoint uses bluemonday.UGCPolicy with p.AllowURLSchemes"data" which permits all data URI schemes...

GHSA-6V7P-G79W-8964 vulnerabilities

Vulnerabilities for packages: authentik-fips, py3-pipenv, tritonserver-backend-vllm-cuda-12.9, openstack-placement-2025.2, dbt-snowflake, pypy-3.11, mitmproxy, openstack-kolla-toolbox-2025.1, jupyter-all-spark-notebook, openstack-glance-2026.1, openstack-placement-2025.1,...

PT-2026-51634

Name of the Vulnerable Software and Affected Versions Gogs versions prior to 0.14.3 Description The Jupyter Notebook ipynb sanitizer endpoint at 'POST /-/api/sanitize ipynb' allows arbitrary data: URIs without proper restrictions, which can lead to Cross-Site Scripting XSS. The endpoint utilizes...

GHSA-6VXV-WG6J-5QWP Gogs: XSS in .ipynb files renderer due to outdated notebookjs

Summary Gogs renders Jupyter notebook files .ipynb using jsvine/notebookjs, but the version is outdated, missing patches for known XSS vulnerabilities. Details Gogs uses version 0.4.2 of notebookjs to render Jupyter notebook files:...

CVE-2026-49384

In JetBrains PyCharm before 2025.3.4 stored XSS in Jupyter notebook Markdown cells was possible...

CVE-2026-40171

A flaw was found in Jupyter Notebook and JupyterLab. A stored cross-site scripting XSS vulnerability in the help command linker can be exploited by an attacker who crafts a malicious notebook file. When a user interacts with this file, the XSS is triggered, allowing the attacker to steal...

JetBrains PyCharm < 2025.3.4 Stored XSS

According to its self-reported version, the JetBrains PyCharm installation on the remote host is prior to 2025.3.4. It is, therefore, affected by a stored cross-site scripting XSS vulnerability in Jupyter notebook Markdown cells. In JetBrains PyCharm before 2025.3.4 stored XSS in Jupyter notebook...

CVE-2026-49384

In JetBrains PyCharm before 2025.3.4 stored XSS in Jupyter notebook Markdown cells was possible...