CVE-2026-44458

The CVE-2026-44458 entry affects Hono prior to version 4.12.18, where the JSX renderer does not escape CSS in style object values, allowing untrusted input to inject extra CSS declarations into the rendered style attribute. Impact is confined to CSS and does not permit JavaScript execution or HTM...

NPM: Mermaid: Improper sanitization of configuration leads to CSS injection

NPM: Mermaid: Improper sanitization of configuration leads to CSS injection vulnerability discovered by ? in WordPress Npm mermaid versions = 10.9.5...

NPM: Mermaid: Improper sanitization of `classDefs` in diagrams leads to CSS injection

NPM: Mermaid: Improper sanitization of classDefs in diagrams leads to CSS injection vulnerability discovered by ? in WordPress Npm mermaid versions = 10.9.5...

Mermaid: Improper sanitization of `classDefs` in diagrams leads to CSS injection

Details The state diagram and any other diagram type that routes user-controlled style strings through createCssStyles parser for Mermaid v11.14.0 and earlier captures classDef values with an unrestricted regex: jison // packages/mermaid/src/diagrams/state/parser/stateDiagram.jison:83 ^\n...

Arbitrary Code Injection

Overview org.webjars.npm:mermaid is a package for generation of diagrams and flowcharts from text in a similar manner as markdown. Affected versions of this package are vulnerable to Arbitrary Code Injection due to improper sanitization of input passed to the addStyleClass function. An attacker c...

CVE-2026-42857

Open edX Platform enables the authoring and delivery of online learning at any scale. The HTML sanitizer cleanthreadhtmlbody used for discussion notification emails fails to remove tags from user-generated discussion post content. This content is rendered with Django's |safe template filter in...

CVE-2026-42857 Open edX Platform: Stored CSS Injection in Email Notifications via Incomplete HTML Sanitization

Open edX Platform enables the authoring and delivery of online learning at any scale. The HTML sanitizer cleanthreadhtmlbody used for discussion notification emails fails to remove tags from user-generated discussion post content. This content is rendered with Django's |safe template filter in...

PT-2026-39885

Name of the Vulnerable Software and Affected Versions Mermaid versions prior to 10.9.6 Mermaid versions 11.0.0-alpha.1 through 11.14.0 Description Improper sanitization in the state diagram and other diagram types that route user-controlled style strings through the createCssStyles parser allows...

Improper Encoding or Escaping of Output

Overview hono is an Ultrafast web framework for the Edges Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output the styleObjectForEach and jsxAttr style serialization paths in the JSX runtime. An attacker can inject arbitrary CSS declarations by supplying...

Hono has CSS Declaration Injection via Style Object Values in JSX SSR

Summary The JSX renderer escapes style attribute object values for HTML but not for CSS. Untrusted input in a style object value or property name can therefore inject additional CSS declarations into the rendered style attribute. The impact is limited to CSS and does not allow JavaScript executio...

GHSA-QP7P-654G-CW7P Hono has CSS Declaration Injection via Style Object Values in JSX SSR

Summary The JSX renderer escapes style attribute object values for HTML but not for CSS. Untrusted input in a style object value or property name can therefore inject additional CSS declarations into the rendered style attribute. The impact is limited to CSS and does not allow JavaScript executio...

Unsafe Dependency Resolution

Overview Affected versions of this package are vulnerable to Unsafe Dependency Resolution due to improper validation of HTTPS certificates in the parser process. An attacker can inject or modify remote CSS content by performing a man-in-the-middle attack during stylesheet loading over HTTPS...

CSS Parser: Improper Certificate Validation allows MITM injection of remote CSS content

Summary The CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning any HTTPS certificate—even entirely untrusted—will...

GHSA-FF6C-W6QF-7XQC CSS Parser: Improper Certificate Validation allows MITM injection of remote CSS content

Summary The CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle MITM attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning any HTTPS certificate—even entirely untrusted—will...

PT-2026-38404

Name of the Vulnerable Software and Affected Versions css parser versions prior to 1.22.0 css parser versions prior to 2.1.0 Description The software fails to validate HTTPS connections when loading stylesheets, which allows a Man-in-the-Middle MITM attacker to inject or modify CSS content. This...

Astra Linux – Vulnerability in Firefox, Thunderbird

An attacker could have injected CSS into stylesheets that are accessible via internal URIs, such as resource:, thereby bypassing a page’s Content Security Policy. This vulnerability affects Firefox ESR 91.11, Thunderbird 102, Thunderbird 91.11, and Firefox 101...

Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : Roundcube Webmail vulnerabilities (USN-8223-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8223-1 advisory. It was discovered that Roundcube Webmail mishandled Punycode xn-- domain names. An attacker could possibl...

USN-8223-1 roundcube vulnerabilities

It was discovered that Roundcube Webmail mishandled Punycode xn-- domain names. An attacker could possibly use this issue to cause a homograph attack. CVE-2019-15237 It was discovered that Roundcube Webmail did not properly sanitize certain attributes when handling CSS within HTML messages and...

PT-2026-37156

Name of the Vulnerable Software and Affected Versions locize versions prior to 4.0.21 Description The locize client SDK registers a window.addEventListener"message", … handler that dispatches to internal handlers such as editKey, commitKey, commitKeys, isLocizeEnabled, and requestInitialize witho...

CVE-2026-40565 FreeScout has Stored XSS / CSS Injection via linkify() — Unescaped URL in Anchor href

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's linkify function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters " in the URL. HTMLPurifier called first via...