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php-symfony-polyfill vulnerabilities

Vulnerabilities published for php-symfony-polyfill in the last 30 days: 0. Listed in the KEV catalogue: 0.

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Vulnerabilities: 1

  1. CVE-2026-46644

    Medium · CVSS 6.9EPSS 0.54%Fix available

    symfony/polyfill-intl-idn accepts xn-- labels whose Punycode payload decodes to ASCII-only: insecure equivalence

    Symfony Polyfill backports PHP features and provides compatibility layers for extensions and functions. From 1.17.1 until 1.38.1, symfony/polyfill-intl-idn accepts xn-- labels whose Punycode payload is empty or decodes to ASCII-only code points because Idn::process() does not enforce the UTS #46 revision 33 requirement that decoded ACE labels contain at least one non-ASCII code point. Originally unequal domain names can be regarded as equal, which can lead to blacklist bypassing, inconsistent URL parsing, and server-side request forgery in applications using the polyfill to canonicalise or compare hostnames. This issue is fixed in version 1.3

    php-symfony-polyfillOperating systems
    • Update to 1.38.1-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

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