CVE-2026-8661

Server-Side Request Forgery in the markdowntopdf action of Rapid7 InsightConnect Markdown Plugin on Linux in versions prior to 4.0.2 allows remote attackers to make arbitrary outbound HTTP requests via unsanitized resource-loading HTML elements img/src, CSS url, @import embedded in Markdown input...

CVE-2026-8661

CVE-2026-8661 affects the Rapid7 InsightConnect Markdown Plugin (Linux) up to version 3.1.4. The vulnerability is in the markdown_to_pdf action and combines Server-Side Scripting (XSS) with Server-Side Request Forgery (SSRF). It allows remote attackers to execute JavaScript server-side and to tri...

CVE-2026-8661 Server-Side Cross-Site Scripting and SSRF in Rapid7 InsightConnect Markdown to PDF Plugin

Server-Side Request Forgery in the markdowntopdf action of Rapid7 InsightConnect Markdown Plugin on Linux in versions prior to 4.0.2 allows remote attackers to make arbitrary outbound HTTP requests via unsanitized resource-loading HTML elements img/src, CSS url, @import embedded in Markdown input...

CVE-2026-8661 Server-Side Cross-Site Scripting and SSRF in Rapid7 InsightConnect Markdown to PDF Plugin

Server-Side Cross-Site Scripting and Server-Side Request Forgery vulnerability in the markdowntopdf action of Rapid7 InsightConnect Markdown Plugin version 3.1.4 and earlier on Linux allows remote attackers to execute JavaScript server-side and make arbitrary outbound HTTP requests via crafted...

CVE-2026-44696: Improper Neutralization of Input During Web Page Generation

OpenProject is open-source, web-based project management software. Prior to 17.4.0, OpenProject's rich text markdown rendering pipeline uses Sanitize::Config::RELAXED:css for inline style sanitization. This configuration permits essentially all CSS properties in style attributes on permitted HTML...

PT-2026-53018

Name of the Vulnerable Software and Affected Versions linkify-it versions prior to 5.0.1 Description LinkifyIt.prototype.match the primary public API contains a structural issue in its JavaScript-level scan loop that results in ON² algorithmic complexity when processing inputs with numerous fuzzy...

CVE-2026-8661: Improper Neutralization of Input During Web Page Generation

Server-Side Request Forgery in the markdowntopdf action of Rapid7 InsightConnect Markdown Plugin on Linux in versions prior to 4.0.2 allows remote attackers to make arbitrary outbound HTTP requests via unsanitized resource-loading HTML elements img/src, CSS url, @import embedded in Markdown input...

CVE-2026-3472: Protection Mechanism Failure

Mattermost versions 10.11.x = 10.11.18, 11.6.x = 11.6.3, 11.5.x = 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated attacker to exfiltrate data to an attacker-controlled server via injecting markdown image syntax into to...

PT-2026-52721

Mattermost versions 10.11.x = 10.11.18, 11.6.x = 11.6.3, 11.5.x = 11.5.6 fail to properly apply markdown image rendering restrictions to AI bot tool result posts, which allows an authenticated attacker to exfiltrate data to an attacker-controlled server via injecting markdown image syntax into to...

PT-2026-52661

Name of the Vulnerable Software and Affected Versions Rapid7 InsightConnect Markdown Plugin versions prior to 3.1.5 Description Server-Side Cross-Site Scripting XSS and Server-Side Request Forgery SSRF exist in the markdown to pdf action. These issues occur because the PDF rendering engine fails ...

CVE-2026-49851

A flaw was found in Mistune, a Python Markdown parser. A remote attacker can exploit this vulnerability by providing a specially crafted Markdown input containing many consecutive bracket characters. This can lead to excessive CPU usage, causing a denial-of-service DoS condition on the affected...

GO-2026-5100 Ech0's RSS feed renders unescaped tag names and raw-HTML markdown, stored XSS against subscribers in github.com/lin-snow/ech0

Ech0's RSS feed renders unescaped tag names and raw-HTML markdown, stored XSS against subscribers in github.com/lin-snow/ech0...

CVE-2026-54025

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, there is a vulnerability in LibreChat's markdown artifact preview pipeline. The marked library v15.0.12 does not HTML-escape double-quote characters in image alt text when a custom renderer falls throu...

CVE-2026-54025

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, there is a vulnerability in LibreChat's markdown artifact preview pipeline. The marked library v15.0.12 does not HTML-escape double-quote characters in image alt text when a custom renderer falls throu...

EUVD-2026-39463

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, there is a vulnerability in LibreChat's markdown artifact preview pipeline. The marked library v15.0.12 does not HTML-escape double-quote characters in image alt text when a custom renderer falls throu...

CVE-2026-54025

LibreChat suffers a stored XSS in its Markdown artifact preview prior to version 0.8.4-rc1. The vulnerability arises because lib re uses marked v15.0.12 to render image alt text without HTML-escaping double quotes when the custom image renderer defers to the default renderer. LibreChat’s generate...

CVE-2026-54025 LibreChat: Stored XSS via unescaped image alt text in markdown artifact preview

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, there is a vulnerability in LibreChat's markdown artifact preview pipeline. The marked library v15.0.12 does not HTML-escape double-quote characters in image alt text when a custom renderer falls throu...

CVE-2026-54025 LibreChat: Stored XSS via unescaped image alt text in markdown artifact preview

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, there is a vulnerability in LibreChat's markdown artifact preview pipeline. The marked library v15.0.12 does not HTML-escape double-quote characters in image alt text when a custom renderer falls throu...

CVE-2026-54025 LibreChat: Stored XSS via unescaped image alt text in markdown artifact preview

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, there is a vulnerability in LibreChat's markdown artifact preview pipeline. The marked library v15.0.12 does not HTML-escape double-quote characters in image alt text when a custom renderer falls throu...

PT-2026-55844

justhtml: to markdown code-span blank-line breakout enables XSS Summary In justhtml 0.9.0 through 1.21.0, to markdown renders text and text inside a link as an inline Markdown code span whose only protection is backtick-fence length. A blank line in that text terminates the inline span in any...