PYSEC-2026-1455 Arbitrary HTML present after sanitization because of unicode normalization

Impact If using keeptypographicwhitespace=False which is the default, the sanitizer normalizes unicode to the NFKC form at the end. Some unicode characters normalize to chevrons; this allows specially crafted HTML to escape sanitization. Patches The problem has been fixed in 2.4.2. Workarounds Se...

PYSEC-2026-2033 WeasyPrint allows the attachment of arbitrary files and URLs to a PDF

Impact Since version 61.0, there's a vulnerability which allows attaching content of arbitrary files and URLs to a generated PDF document, even if urlfetcher is configured to prevent access to files and URLs. Patches Fixed by 734ee8e that’s included in 61.2 Workarounds - Check that no PDF...

PYSEC-2026-1311 Docassemble HTML and javascript injection

Impact A user could type HTML into a field, including the field for the user's name, and then that HTML could be displayed on the screen as HTML. The HTML can also contain tags allowing JavaScript to execute on the page. Patches The vulnerability has been patched in version 1.4.97 of the master...

PYSEC-2026-1509 langchain Server-Side Request Forgery vulnerability

With the following crawler configuration: python from bs4 import BeautifulSoup as Soup url = "https://example.com" loader = RecursiveUrlLoader url=url, maxdepth=2, extractor=lambda x: Soupx, "html.parser".text docs = loader.load An attacker in control of the contents of https://example.com could...

PYSEC-2026-1631 Potentially untrusted input is rendered as HTML in final output

Impact All users of mjml-python who insert untrusted data into mjml templates unless that data is checked in a very strict manner. User input like script would be rendered as in the final HTML output. The attacker must be able to control some data which is later injected in an mjml template which...

PYSEC-2026-1473 Jinja vulnerable to HTML attribute injection when passing user input as keys to xmlattr filter

The xmlattr filter in affected versions of Jinja accepts keys containing spaces. XML/HTML attributes cannot contain spaces, as each would then be interpreted as a separate attribute. If an application accepts keys as opposed to only values as user input, and renders these in pages that other user...

PYSEC-2026-1820 pyload Unauthenticated Flask Configuration Leakage vulnerability

Summary Any unauthenticated user can browse to a specific URL to expose the Flask config, including the SECRETKEY variable. Details Any unauthenticated user can browse to a specific URL to expose the Flask config, including the SECRETKEY variable. PoC Run pyload in the default configuration by...

PYSEC-2026-1333 Ethyca Fides HTML Injection Vulnerability in HTML-Formatted DSR Packages

Impact The Fides web application allows data subject users to request access to their personal data. If the request is approved by the data controller user operating the Fides web application, the data subject's personal data can then retrieved from connected systems and data stores before being...

PYSEC-2026-782 Apache Superset vulnerable to Injection

An authenticated attacker with write CSS template permissions can create a record with specific HTML tags that will not get properly escaped by the toast message displayed when a user deletes that specific CSS template record. This issue affects Apache Superset version 1.5.2 and prior versions an...

PYSEC-2026-837 Cross-site Scripting in kiwitcms

A stored XSS in a kiwi Test Plan can run malicious javascript which could be chained with an HTML injection to perform a UI redressing attack clickjacking and an HTML injection which disables the use of the history page...

CVE-2026-7380

Improper neutralization of Script-Related HTML tags in a web page basic XSS vulnerability in Armiya Information Technologies Ltd. Co. Access Control System GKS allows XSS Targeting HTML Attributes. This issue affects Access Control System GKS: before Version 2...

firefox: thunderbird: JIT miscompilation in the DOM: Core & HTML component

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the DOM: Core & HTML component...

firefox: thunderbird: JIT miscompilation in the DOM: Core & HTML component

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the DOM: Core & HTML component...

firefox: thunderbird: JIT miscompilation in the DOM: Core & HTML component

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the DOM: Core & HTML component...

firefox: thunderbird: JIT miscompilation in the DOM: Core & HTML component

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the DOM: Core & HTML component...

EUVD-2026-41954

showdown contains a stored cross-site scripting vulnerability in the parseHeaders function of src/subParsers/makehtml/tables.js that fails to properly escape table header ID attributes. Attackers can inject arbitrary HTML and script-executing SVG elements through double-quote characters in markdo...

CVE-2026-36163

An HTML injection vulnerability in the file view endpoint of LiquidFiles v4.2.7 allows authenticated attackers to execute arbitrary JavaScript in the context of the victim's browser via the uploading of and user interaction with a crafted HTML file...

Important: firefox

Issue Overview: Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. CVE-2026-12289 Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firef...

HTML injection in Diagram tab and Graph view in Guardian/CMC before 26.2.0

Summary A Stored HTML Injection vulnerability was discovered in the Diagram tab and Graph view due to a shared input validation function being insufficiently restrictive. Impact An authenticated user with administrative privileges can inject malicious HTML tags into N2OS configuration data throug...

CVE-2026-36163

CVE-2026-36163 describes an HTML injection vulnerability in the file view endpoint of LiquidFiles v4.2.7. Authenticated attackers can upload and interact with a crafted HTML file to trigger arbitrary JavaScript execution in the victim’s browser. The affected component is the file view handling pa...