SUSE CVE-2026-59927

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the Include directive in src/mistune/directives/include.py detects only direct self-includes and not indirect cycles, allowing two markdown files that include each other to trigger unbounded recursion, raise...

EUVD-2026-42764

A vulnerability was identified in NousResearch hermes-agent up to 2026.5.29.2. Affected by this issue is the function MatrixAdapter.markdowntohtml of the file gateway/platforms/matrix.py of the component Matrix Adapter. Such manipulation leads to cross site scripting. The attack can be executed...

CVE-2026-15311

A vulnerability was identified in NousResearch hermes-agent up to 2026.5.29.2. Affected by this issue is the function MatrixAdapter.markdowntohtml of the file gateway/platforms/matrix.py of the component Matrix Adapter. Such manipulation leads to cross site scripting. The attack can be executed...

EUVD-2026-39007

Mistune: Potential DoS via quadratic-time parsing in parselinktext...

GHSA-QCQ2-496W-V96P Mistune: Potential DoS via quadratic-time parsing in parse_link_text

Summary Mistune is vulnerable to a CPU exhaustion DoS due to superlinear approximately On² behavior in parselinktext. A relatively small input consisting of repeated characters causes significant parsing slowdown. Affected component mistune/inlineparser.py → parselinktext Description When parsing...

CVE-2026-15311 NousResearch hermes-agent Matrix Adapter matrix.py MatrixAdapter._markdown_to_html cross site scripting

A vulnerability was identified in NousResearch hermes-agent up to 2026.5.29.2. Affected by this issue is the function MatrixAdapter.markdowntohtml of the file gateway/platforms/matrix.py of the component Matrix Adapter. Such manipulation leads to cross site scripting. The attack can be executed...

CVE-2026-15311 NousResearch hermes-agent Matrix Adapter matrix.py MatrixAdapter._markdown_to_html cross site scripting

A vulnerability was identified in NousResearch hermes-agent up to 2026.5.29.2. Affected by this issue is the function MatrixAdapter.markdowntohtml of the file gateway/platforms/matrix.py of the component Matrix Adapter. Such manipulation leads to cross site scripting. The attack can be executed...

CVE-2026-15311

The CVE-2026-15311 entry concerns NousResearch hermes-agent (Matrix Adapter). The vulnerability specifically affects MatrixAdapter._markdown_to_html in gateway/platforms/matrix.py, enabling cross-site scripting. It can be exploited remotely and publicly available exploit code exists. The related ...

CVE-2026-59926

A flaw was found in Mistune, a Python Markdown parser. The renderadmonition function in the Admonition directive concatenates user-controlled input into the HTML class attribute without proper escaping. This vulnerability allows for attribute injection and Cross-Site Scripting XSS attacks, even...

CVE-2026-59925

A flaw was found in Mistune, a Python Markdown parser. An attacker can exploit this vulnerability by providing specially crafted Markdown input containing long sequences of emphasis pairs. This can cause the parser to perform excessive computational work, leading to a denial of service DoS...

CVE-2026-59928

A flaw was found in Mistune, a Python Markdown parser. A remote attacker could exploit this vulnerability by providing a specially crafted Markdown document containing numerous repeated or distinct reference-link definitions. This can lead to excessive processing, causing CPU exhaustion and a...

CVE-2026-59927

A flaw was found in Mistune, a Python Markdown parser. The Include directive in Mistune's src/mistune/directives/include.py does not properly detect indirect cycles when two Markdown files include each other. This oversight allows for unbounded recursion, which can lead to a RecursionError and...

Linux Distros Unpatched Vulnerability : CVE-2026-59924

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. Prior to 3.3.0, Include.parse joins and normalizes user-supplied include paths without verifying...

Linux Distros Unpatched Vulnerability : CVE-2026-59927

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. Prior to 3.3.0, the Include directive in src/mistune/directives/include.py detects only direct...

Linux Distros Unpatched Vulnerability : CVE-2026-59922

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. Prior to 3.3.0, a run of closed tilde, equals-sign, or caret marker pairs around a character...

Linux Distros Unpatched Vulnerability : CVE-2026-59928

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. Prior to 3.3.0, a Markdown document containing many repeated or distinct reference-link...

Linux Distros Unpatched Vulnerability : CVE-2026-59923

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. Prior to 3.3.0, HTMLRenderer.safeurl does not block percent-encoded javascript URIs, allowing...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via the safeurl function. An attacker can execute arbitrary scripts in the rendered HTML by supplying specially crafted percent-encoded javascript URIs in Markdown links or images. Details Cross-site scripting o...

Inefficient Algorithmic Complexity

Overview Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity via the blockparser process. An attacker can cause excessive CPU consumption by submitting specially crafted Markdown documents containing numerous repeated or distinct reference-link definitions...

Uncontrolled Recursion

Overview Affected versions of this package are vulnerable to Uncontrolled Recursion through the include process. An attacker can cause the application to crash by creating two markdown files that recursively include each other, leading to unbounded recursion and a RecursionError. Remediation...