Security Bulletin: Langflow is vulnerable to stored cross-site scripting and IP spoofing due to unsanitized Markdown rendering and untrusted proxy header trust

Summary Langflow contains two vulnerabilities affecting client-side security and access control integrity. The MarkdownField component renders chat messages using the rehypeRaw plugin without a sanitization pass, causing attacker-controlled LLM response text containing raw HTML to be inserted...

EUVD-2026-42992

Snipe-IT vulnerable to stored XSS via Markdown custom field...

GHSA-R52F-R9V5-66XR Snipe-IT vulnerable to stored XSS via Markdown custom field

Impact CommonMark is configured with htmlinput = 'escape', which blocks raw HTML injection. However, javascript: URIs in Markdown hyperlinks are not sanitized. A user with assets.edit permission can inject a malicious link into any markdown-textarea custom field. Any user who opens the asset deta...

Snipe-IT vulnerable to stored XSS via Markdown custom field

Impact CommonMark is configured with htmlinput = 'escape', which blocks raw HTML injection. However, javascript: URIs in Markdown hyperlinks are not sanitized. A user with assets.edit permission can inject a malicious link into any markdown-textarea custom field. Any user who opens the asset deta...

Arbitrary Code Injection

Overview compliance-trestle is a Tools to manage & autogenerate python objects representing the OSCAL layers/models Affected versions of this package are vulnerable to Arbitrary Code Injection in the parse process. An attacker can execute arbitrary commands on the system by injecting malicious...

CLSA-2026-1787916789 TuxCare security update for markdown-it (1 CVE)

TuxCare rebuilt markdown-it to address 1 CVE. Fixed in 4.3.0-tuxcare.3...

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...

CVE-2026-57170

Compliance-trestle Trestle is a Python SDK and command-line tool for managing OSCAL compliance documents. In versions prior to 3.12.4 and 4.0.0 through 4.0.3, the custom Jinja2 include tags mdsectioninclude and mdcleaninclude re-parse the content of an included Markdown file as Jinja2 template co...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: obs-server (UTSA-2026-093229)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-093229 advisory. A Improper Neutralization of Input During Web Page Generation 'Cross-site Scripting' vulnerability in Open Build Service allows remote attackers to store JS code in...

CVE-2026-57170 Trestle SSTI in Jinja2 include tags allows arbitrary code execution (Incomplete fix of CVE-2026-46439)

Compliance-trestle Trestle is a Python SDK and command-line tool for managing OSCAL compliance documents. In versions prior to 3.12.4 and 4.0.0 through 4.0.3, the custom Jinja2 include tags mdsectioninclude and mdcleaninclude re-parse the content of an included Markdown file as Jinja2 template co...

CVE-2026-54757 Trestle has Server-Side Template Injection (SSTI) via Recursive Template Re-evaluation of Untrusted Data

Compliance-trestle Trestle is a Python SDK and command-line tool for managing OSCAL compliance documents. In versions before 3.12.4 and versions 4.0.0 through 4.0.3, Trestle is vulnerable to server-side template injection that can lead to remote code execution. This occurs because the...

CVE-2026-79663 Ech0 before 4.7.3 Stored XSS via RSS feed tag names

Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS...

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...

PT-2026-81282

Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS...

PT-2026-81902

Name of the Vulnerable Software and Affected Versions Compliance-trestle versions prior to 3.12.4 Compliance-trestle versions 4.0.0 through 4.0.3 Description Custom Jinja2 include tags mdsection include and md clean include re-parse the content of included Markdown files as template code within a...

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...

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...