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...

PYSEC-2026-1286 Dagster Local File Inclusion vulnerability

Local File Inclusion in dagster.grpc.impl.getnotebookdata in Dagster 1.10.14 allows attackers with access to the gRPC server to read arbitrary files by supplying path traversal sequences in the notebookpath field of ExternalNotebookData requests, bypassing the intended extension-based check...

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-2026-688 JupyterLab: XSS due to lack of sanitization of the action attribute of an html <form>

Impact Untrusted notebook can execute code on load. This is a remote code execution, but requires user action to open a notebook. Patches Patched in the following versions: 3.1.4, 3.0.17, 2.3.2, 2.2.10, 1.2.21. References OWASP Page on Restricting Form Submissions For more information If you have...

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...

[SECURITY] Fedora 43 Update: python-jupytext-1.19.4-1.fc43

Have you always wished Jupyter notebooks were plain text documents? Wished you could edit them in your favorite IDE? And get clear and meaningful diffs when doing version control? Then... Jupytext may well be the tool you're looking for! Jupytext is a plugin for Jupyter that can save Jupyter...

[SECURITY] Fedora 44 Update: python-jupytext-1.19.4-1.fc44

Have you always wished Jupyter notebooks were plain text documents? Wished you could edit them in your favorite IDE? And get clear and meaningful diffs when doing version control? Then... Jupytext may well be the tool you're looking for! Jupytext is a plugin for Jupyter that can save Jupyter...

GO-2026-5477 Gogs has Stored XSS in `.ipynb` Preview in gogs.io/gogs

Gogs has Stored XSS in .ipynb Preview 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 reports from vulnerability scanners, please suggest an edit to the...

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-2026-52798

Gogs is an open source self-hosted Git service. Prior to 0.14.3, although .ipynb previews are sanitized on the server side via /-/api/sanitizeipynb, the inserted content is re-rendered on the client side without sanitization using marked on elements with the .nb-markdown-cell class. During this...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via the /-/api/sanitizeipynb endpoint, which fails to properly restrict data URI schemes in Jupyter Notebook sanitization. An attacker can execute arbitrary JavaScript in the context of another user by submittin...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via the /-/api/sanitizeipynb endpoint, which fails to properly restrict data URI schemes in Jupyter Notebook sanitization. An attacker can execute arbitrary JavaScript in the context of another user by submittin...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via the /-/api/sanitizeipynb endpoint, which fails to properly restrict data URI schemes in Jupyter Notebook sanitization. An attacker can execute arbitrary JavaScript in the context of another user by submittin...

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...

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...

EUVD-2026-39076

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...