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symfony/polyfill-intl-idn Punycode Validation Bypass Leading to SSRF Risk

Security Advisory High Symfony
Affected:
  • symfony/polyfill >= 1.17.1, < 1.38.1
  • symfony/polyfill-intl-idn >= 1.17.1, < 1.38.1
Fixed in:
  • 1.38.1
Referenced CVEs: CVE-2026-46644
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