418 matches found
EUVD-2026-65137
Mistune: Denial of Service — RecursionError via Excessive Emphasis Markers in Markdown...
GHSA-6M44-FPC8-C3RQ Mistune: Denial of Service — RecursionError via Excessive Emphasis Markers in Markdown
Summary Mistune v3.3.2 is vulnerable to a Denial of Service DoS attack via uncontrolled recursion in the HTML rendering of deeply-nested emphasis tokens. By submitting Markdown containing approximately 1,000 consecutive asterisk characters, an attacker causes the Python process to crash with...
CVE-2026-76098
A flaw was found in Mistune, a Python Markdown parser. This vulnerability allows a remote attacker to trigger a Denial of Service DoS by submitting specially crafted Markdown input. The excessive use of emphasis markers, such as consecutive asterisks, creates deeply nested tokens during HTML...
Linux Distros Unpatched Vulnerability : CVE-2026-76098
The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering...
Uncontrolled Recursion
Overview Affected versions of this package are vulnerable to Uncontrolled Recursion through the InlineParser emphasis processing in src/mistune/inlineparser.py. An attacker can crash the Python process by supplying Markdown with a very long run of emphasis markers, such as hundreds or thousands o...
DEBIAN-CVE-2026-76098
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.rendertoken can excee...
AZL-97956 CVE-2026-76098 affecting package python-mistune for versions less than 3.3.4-1
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.rendertoken can excee...
CVE-2026-76098
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.rendertoken can excee...
UBUNTU-CVE-2026-76098
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.rendertoken can excee...
CVE-2026-76098
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.rendertoken can excee...
CVE-2026-76098
Mistune (Python Markdown parser) versions 3.3.0 through 3.3.2 are vulnerable to Denial of Service via deeply nested emphasis tokens. When HTML rendering processes consecutive asterisk characters, recursive calls in HTMLRenderer.render_token() can exceed Python's recursion limit, raising a Recursi...
CVE-2026-76098
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.rendertoken can excee...
CVE-2026-76098 Mistune has Denial of Service — RecursionError via Excessive Emphasis Markers in Markdown
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.rendertoken can excee...
PT-2026-81027
Name of the Vulnerable Software and Affected Versions Mistune versions 3.3.0 through 3.3.2 Description This issue allows a Denial of Service DoS through deeply nested tokens. When rendering HTML, consecutive asterisk characters can create deeply nested emphasis tokens. The recursive rendering...
CVE-2026-59922
A flaw was found in Mistune, a Python Markdown parser. A remote attacker could exploit this vulnerability by providing specially crafted input containing specific marker pairs tilde, equals-sign, or caret. This crafted input causes the parser to perform quadratic work, leading to excessive CPU...
CVE-2026-59924
A flaw was found in Mistune, a Python Markdown parser. The Include.parse function does not properly verify user-supplied include paths, allowing an attacker to craft paths that can access files outside the intended markdown directory. This can lead to information disclosure when markdown files ar...
Cross-site Scripting (XSS)
Mistune is vulnerable to Cross-Site Scripting XSS. The vulnerability is due to improper escaping of the Admonition directive :class: option when rendering HTML, which allows an attacker to inject malicious attributes and execute arbitrary JavaScript in a victim's browser...
EUVD-2026-42336
Mistune renderers/html.safeurl: HARMFULPROTOCOLS list misses legacy and chained schemes that historically chain to javascript: execution...
GHSA-QFRW-5RXM-MHH2 Mistune renderers/html.safe_url: HARMFUL_PROTOCOLS list misses legacy and chained schemes that historically chain to `javascript:` execution
Summary Type: URL-scheme allowlist gap. The safeurl filter only blocks the four schemes javascript:, vbscript:, file:, data:. Several other schemes are accepted into rendered and tags despite being known XSS vectors in legacy or chain-handling browsers. The same gap applies to direct links,...