CVE-2026-50290

SpecifyJS is a declarative TypeScript user interface framework. Prior to version 0.2.136, CSS value sanitization stripped expression and urljavascript: using simple regex, but could be bypassed with CSS unicode escapes \65xpression, null bytes, or CSS comments exp//ression. These CSS injection...

CVE-2026-50290 @asymmetric-effort/specifyjs: CSS expression sanitization is bypassable in renderToString

SpecifyJS is a declarative TypeScript user interface framework. Prior to version 0.2.136, CSS value sanitization stripped expression and urljavascript: using simple regex, but could be bypassed with CSS unicode escapes \65xpression, null bytes, or CSS comments exp//ression. These CSS injection...

CVE-2026-50290 @asymmetric-effort/specifyjs: CSS expression sanitization is bypassable in renderToString

SpecifyJS is a declarative TypeScript user interface framework. Prior to version 0.2.136, CSS value sanitization stripped expression and urljavascript: using simple regex, but could be bypassed with CSS unicode escapes \65xpression, null bytes, or CSS comments exp//ression. These CSS injection...

Cross-site Scripting (XSS)

Overview @asymmetric-effort/specifyjs is an A declarative TypeScript UI framework built for performance and simplicity Affected versions of this package are vulnerable to Cross-site Scripting XSS in the renderToString process. An attacker can inject malicious CSS expressions by bypassing the...

GHSA-93Q6-WWJH-JC6H @asymmetric-effort/specifyjs: CSS expression sanitization is bypassable in renderToString

Finding Location: core/src/server/render-to-string.ts:307-311 CSS value sanitization stripped expression and urljavascript: using simple regex, but could be bypassed with CSS unicode escapes \65xpression, null bytes, or CSS comments exp//ression. Mitigating Factor: These CSS injection vectors onl...

@asymmetric-effort/specifyjs: CSS expression sanitization is bypassable in renderToString

Finding Location: core/src/server/render-to-string.ts:307-311 CSS value sanitization stripped expression and urljavascript: using simple regex, but could be bypassed with CSS unicode escapes \65xpression, null bytes, or CSS comments exp//ression. Mitigating Factor: These CSS injection vectors onl...

PT-2026-55466

Name of the Vulnerable Software and Affected Versions SpecifyJS versions prior to 0.2.136 Description CSS value sanitization in the core/src/server/render-to-string.ts file used simple regular expressions to strip expression and urljavascript:, which could be bypassed using null bytes, CSS...

Improper Isolation or Compartmentalization

Overview org.webjars.npm:vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules. Affected versions of this package are vulnerable to Improper Isolation or Compartmentalization through the transformer fast-path in the source instrumentation logic. An attacker can...

Improper Isolation or Compartmentalization

Overview vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules. Affected versions of this package are vulnerable to Improper Isolation or Compartmentalization through the transformer fast-path in the source instrumentation logic. An attacker can expose the internal...

Cross-site scripting (XSS) via script break-out in toScript() output

What's Changed Escape HTML tags in toScript output to prevent script break-out by @freekmurze in https://github.com/spatie/schema-org/pull/242 Values containing passed as schema properties could break out of the generated block and execute injected HTML when the value was attacker-controlled...

CVE-2026-28348

lxmlhtmlclean is a project for HTML cleaning functionalities copied from lxml.html.clean. Prior to version 0.4.4, the hassneakyjavascript method strips backslashes before checking for dangerous CSS keywords. This causes CSS Unicode escape sequences to bypass the @import and expression filters,...

CVE-2026-28348

lxmlhtmlclean is a project for HTML cleaning functionalities copied from lxml.html.clean. Prior to version 0.4.4, the hassneakyjavascript method strips backslashes before checking for dangerous CSS keywords. This causes CSS Unicode escape sequences to bypass the @import and expression filters,...

CVE-2026-28348 lxml_html_clean: CSS @import Filter Bypass via Unicode Escapes

lxmlhtmlclean is a project for HTML cleaning functionalities copied from lxml.html.clean. Prior to version 0.4.4, the hassneakyjavascript method strips backslashes before checking for dangerous CSS keywords. This causes CSS Unicode escape sequences to bypass the @import and expression filters,...

CVE-2026-28348

lxmlhtmlclean is a project for HTML cleaning functionalities copied from lxml.html.clean. Prior to version 0.4.4, the hassneakyjavascript method strips backslashes before checking for dangerous CSS keywords. This causes CSS Unicode escape sequences to bypass the @import and expression filters,...

CVE-2026-28348 lxml_html_clean: CSS @import Filter Bypass via Unicode Escapes

lxmlhtmlclean is a project for HTML cleaning functionalities copied from lxml.html.clean. Prior to version 0.4.4, the hassneakyjavascript method strips backslashes before checking for dangerous CSS keywords. This causes CSS Unicode escape sequences to bypass the @import and expression filters,...

CVE-2026-28348 lxml_html_clean: CSS @import Filter Bypass via Unicode Escapes

lxmlhtmlclean is a project for HTML cleaning functionalities copied from lxml.html.clean. Prior to version 0.4.4, the hassneakyjavascript method strips backslashes before checking for dangerous CSS keywords. This causes CSS Unicode escape sequences to bypass the @import and expression filters,...

CVE-2026-28348

CVE-2026-28348 affects the python-lxml_html_clean package. Before 0.4.4, the _has_sneaky_javascript() path strips backslashes before checking dangerous CSS keywords, allowing CSS Unicode escapes to bypass @import and expression() filters, enabling external CSS loading or XSS in older browsers. Th...

lxml_html_clean 安全漏洞

lxmlhtmlclean is a separate project derived from lxml.HTML.clean, open sourced by the Fedora Python SIG. Versions of lxmlhtmlclean prior to 0.4.4 contained security vulnerabilities. These vulnerabilities stemmed from the hassneakyjavascript method, which strips backslashes before checking for...

GHSA-HW26-MMPG-FQFG lxml-html-clean has CSS @import Filter Bypass via Unicode Escapes

Summary The hassneakyjavascript method strips backslashes before checking for dangerous CSS keywords. This causes CSS Unicode escape sequences to bypass the @import and expression filters, allowing external CSS loading or XSS in older browsers. Details The root cause is located in clean.py around...

Improper Encoding or Escaping of Output

Overview lxml-html-clean is a HTML cleaner from lxml project Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output in the hassneakyjavascript function. An attacker can cause external CSS to be loaded or execute scripts in certain browsers by injecting special...