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@llui/security

v0.2.0

Published

LLui shared security primitives — one canonical, dependency-free home for URL-scheme sanitization (sanitizeUrl) and loopback/same-origin recognition (CSRF/CSWSH gating), so security-sensitive logic can't drift between packages

Vulnerabilities

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  • 0Medium
  • 0Low

Links

Git

Maintainers

fponticellifponticelli

Keywords

lluisecuritysanitizeurlcsrfloopback

Readme

@llui/security

Tiny, dependency-free home of LLui's security-sensitive primitives. Each lives here in exactly ONE place so a fix can't drift between copies (the flaw this package was extracted to remove).

Everything uses only WHATWG URL + regex — no node:* builtins — so it is safe to import from browser bundles.

  • url — sanitizeUrl(url, allowedProtocols?) scheme allow-listing (defaultAllowedProtocols), the micromark-style parse shared by @llui/markdown, @llui/markdown-editor, and @llui/a2ui.
  • loopback — isLoopbackHost / isLoopbackAuthority / isLoopbackOrigin, the same-machine recognition that gates CSRF/CSWSH in @llui/mcp and @llui/vite-plugin. Host set is { localhost, 127.0.0.1, ::1 }; 0.0.0.0 is deliberately NOT loopback.
pnpm add @llui/security
import { sanitizeUrl, defaultAllowedProtocols } from '@llui/security'
import { isLoopbackOrigin, isLoopbackAuthority } from '@llui/security'
// or via subpaths:
import { sanitizeUrl } from '@llui/security/url'
import { isLoopbackAuthority } from '@llui/security/loopback'