CVE-2026-20841

CVE-2026-20841 - Windows Notepad Remote Code Execution RCE Security Research & Technical Analysis Repository ⚠️ This repository is intended for educational, defensive, and research purposes only. 📖 Overview CVE-2026-20841 is a critical Remote Code Execution RCE vulnerability affecting Microsoft...

Linux Distros Unpatched Vulnerability : CVE-2026-86431

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - league/commonmark thephpleague/commonmark versions = 2.7.0 and 2.9.1 contain a cross-site scripting vulnerability in the AttributesExtension. Prefixing an...

CVE-2026-80180

Stored XSS via markdown HTML processing in Apache Allura. This issue affects Apache Allura: from through 1.20.0. Users are recommended to upgrade to version 1.21.0, which fixes the issue...

EUVD-2026-70921

Stored XSS via markdown HTML processing in Apache Allura. This issue affects Apache Allura: from through 1.20.0. Users are recommended to upgrade to version 1.21.0, which fixes the issue...

CVE-2026-80180 Apache Allura: Stored XSS via markdown HTML processing

Stored XSS via markdown HTML processing in Apache Allura. This issue affects Apache Allura: from through 1.20.0. Users are recommended to upgrade to version 1.21.0, which fixes the issue...

CVE-2026-80180

Apache Allura versions through 1.20.0 are affected by a stored cross-site scripting (XSS) vulnerability in its markdown HTML processing pipeline. An attacker can inject malicious HTML that executes in other users' browsers upon viewing the content. The CVSS 3.1 score is 6.1 (MEDIUM) with a vector...

linkify-it: linkify-it: Denial of Service via algorithmic complexity vulnerability

A flaw was found in linkify-it, a library for recognizing links with full Unicode support. The LinkifyIt.prototype.match function, the package's primary public API, has an algorithmic complexity of ON² for inputs containing many fuzzy links or emails. This can be exploited by a remote attacker...

GHSA-R4RV-85JG-W4MF Mistune: Arbitrary File Read via Include directive path traversal

Summary A path traversal issue exists in mistune's Include directive when markdown files are processed using md.read. A crafted include path can cause files outside the intended markdown directory to be accessed. Details The issue occurs in the Include.parse method where user-supplied paths are...

PT-2026-56517

Name of the Vulnerable Software and Affected Versions Mistune versions prior to 3.3.0 Description Mistune is a Python Markdown parser with renderers and plugins. The Include.parse function joins and normalizes user-supplied include paths without verifying that the result remains within the intend...

OSV-2026-816 Heap-buffer-overflow in md_process_all_blocks

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=516422428 Crash type: Heap-buffer-overflow READ Crash state: mdprocessallblocks mdparse mdhtml...

PT-2026-47121

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=516422428 Crash type: Heap-buffer-overflow READ Crash state: md process all blocks md parse md html...

Sveltia CMS: Stored XSS in entry summary rendering via entity-decoded HTML

Impact A stored cross-site scripting XSS vulnerability affected entry summary rendering in Sveltia CMS. Entry summaries that allowed limited Markdown were parsed, sanitized, and then HTML entities were decoded. This order allowed specially crafted entity-encoded HTML, such as encoded tags or even...

GHSA-97R8-RF7Q-WMJW Sveltia CMS: Stored XSS in entry summary rendering via entity-decoded HTML

Impact A stored cross-site scripting XSS vulnerability affected entry summary rendering in Sveltia CMS. Entry summaries that allowed limited Markdown were parsed, sanitized, and then HTML entities were decoded. This order allowed specially crafted entity-encoded HTML, such as encoded tags or even...

Cross-site Scripting (XSS)

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Cross-site Scripting XSS in the attribute process. An attacker can execute arbitrary JavaScript in the context of users who view a page by...

CVE-2026-1090

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user, when the markdownplaceholders feature flag was enabled, to inject JavaScript in a browser due to improper...

EUVD-2026-11180

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user, when the markdownplaceholders feature flag was enabled, to inject JavaScript in a browser due to improper...

CVE-2026-1090

Removed by vendor...

CVE-2026-28451

OpenClaw versions prior to 2026.2.14 contain server-side request forgery vulnerabilities in the Feishu extension that allow attackers to fetch attacker-controlled remote URLs without SSRF protections via sendMediaFeishu function and markdown image processing. Attackers can influence tool calls...

CVE-2026-28451 OpenClaw < 2026.2.14 - SSRF via Feishu Extension Media Fetching

OpenClaw versions prior to 2026.2.14 contain server-side request forgery vulnerabilities in the Feishu extension that allow attackers to fetch attacker-controlled remote URLs without SSRF protections via sendMediaFeishu function and markdown image processing. Attackers can influence tool calls...

GitLab 18.7 < 18.7.4 / 18.8 < 18.8.4 (CVE-2026-1456)

The version of GitLab installed on the remote host is affected by a vulnerability, as follows: - GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before 18.7.4, and 18.8 before 18.8.4 that could have allowed an unauthenticated user to cause denial of service through...