PYSEC-2026-1632 mkdocs-include-markdown-plugin susceptible to unvalidated input colliding with substitution placeholders

Impact CWE-20: Improper Input Validation Low impact Patches Patched in v7.1.8 commit https://github.com/mondeja/mkdocs-include-markdown-plugin/commit/7466d67aa0de8ffbc427204ad2475fed07678915 Workarounds No...

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...

Open WebUI denial of service through endpoint for converting markdown

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until...

PYSEC-2026-1723 Open WebUI denial of service through endpoint for converting markdown

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until...

PYSEC-2026-1720 Open WebUI Vulnerable to a Session Fixation Attack

A vulnerability in open-webui/open-webui version 0.3.8 allows an attacker with a user-level account to perform a session fixation attack. The session cookie for all users is set with the default SameSite=Lax and does not have the Secure flag enabled, allowing the session cookie to be sent over HT...

JupyterLab vulnerable to SXSS in Markdown Preview

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-2026-1707 JupyterLab vulnerable to SXSS in Markdown Preview

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...

Any file can be included with the pymdown-snippets extension

SummaryArbitrary file read when using include file syntax. DetailsBy using the syntax --8--"/etc/passwd" or --8--"/proc/self/environ" the content of these files will be rendered in the generated documentation. Additionally, a path relative to a specified, allowed base path can also be used to...

Apache Superset vulnerable to Cross-site Scripting

Dashboard rendering does not sufficiently sanitize the content of markdown components leading to possible XSS attack vectors that can be performed by authenticated users with create dashboard permissions. This issue affects Apache Superset version 1.5.2 and prior versions and version 2.0.0...

PYSEC-2026-779 Apache Superset vulnerable to Cross-site Scripting

Dashboard rendering does not sufficiently sanitize the content of markdown components leading to possible XSS attack vectors that can be performed by authenticated users with create dashboard permissions. This issue affects Apache Superset version 1.5.2 and prior versions and version 2.0.0...

Cross-site Scripting (XSS)

Overview org.webjars.npm:showdown is a JavaScript Markdown to HTML converter. Affected versions of this package are vulnerable to Cross-site Scripting XSS in the parseHeaders function. An attacker can execute arbitrary scripts in the context of users viewing rendered markdown by injecting special...

EUVD-2026-41954

showdown contains a stored cross-site scripting vulnerability in the parseHeaders function of src/subParsers/makehtml/tables.js that fails to properly escape table header ID attributes. Attackers can inject arbitrary HTML and script-executing SVG elements through double-quote characters in markdo...

showdown allows stored cross-site scripting through table header ID injection

showdown contains a stored cross-site scripting vulnerability in the parseHeaders function of src/subParsers/makehtml/tables.js that fails to properly escape table header ID attributes. Attackers can inject arbitrary HTML and script-executing SVG elements through double-quote characters in markdo...

AlmaLinux 9 : python-markdown (ALSA-2026:19366)

The remote AlmaLinux 9 host has a package installed that is affected by a vulnerability as referenced in the ALSA-2026:19366 advisory. python-markdown: denial of service via malformed HTML-like sequences CVE-2025-69534 Tenable has extracted the preceding description block directly from the...

20mk-utils (>=1.0.0, <=1.0.3), 2d-spirograph (>=1.0.2, <=1.0.4) +2106 more potentially affected by CVE-2026-59711 via showdown (>=0.0.1, <=2.1.0)

showdown NPM version =0.0.1, =1.0.0, =1.0.2, =2.0.4, =1.0.6, =0.1.4, =0.1.4, =0.1.4, =13.351.0, =13.351.0, =7.10.0, =7.10.0, =0.0.3, =0.5.1 - @adalink/spark-chat 1.0.0 and more Source cves: CVE-2026-59711 Source advisory: SNYK:JS-SHOWDOWN-17874448...

CVE-2026-59710

showdown contains a stored cross-site scripting vulnerability in the parseHeaders function of src/subParsers/makehtml/tables.js that fails to properly escape table header ID attributes. Attackers can inject arbitrary HTML and script-executing SVG elements through double-quote characters in markdo...

GHSA-CR32-G25G-VXJJ showdown metadata title handling allows cross-site scripting

showdown contains a cross-site scripting vulnerability in metadata title handling that allows attackers to inject arbitrary HTML and JavaScript. When completeHTMLDocument option is enabled, unescaped less-than and greater-than characters in markdown frontmatter metadata are inserted directly into...

showdown metadata title handling allows cross-site scripting

showdown contains a cross-site scripting vulnerability in metadata title handling that allows attackers to inject arbitrary HTML and JavaScript. When completeHTMLDocument option is enabled, unescaped less-than and greater-than characters in markdown frontmatter metadata are inserted directly into...

CVE-2026-59710

showdown contains a stored cross-site scripting vulnerability in the parseHeaders function of src/subParsers/makehtml/tables.js that fails to properly escape table header ID attributes. Attackers can inject arbitrary HTML and script-executing SVG elements through double-quote characters in markdo...

CVE-2026-59710 showdown - Stored XSS via Unescaped Table Header ID Attribute Injection

showdown contains a stored cross-site scripting vulnerability in the parseHeaders function of src/subParsers/makehtml/tables.js that fails to properly escape table header ID attributes. Attackers can inject arbitrary HTML and script-executing SVG elements through double-quote characters in markdo...