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* 🛡️ fix: Cover full fe80::/10 link-local range in SSRF IPv6 check The `isPrivateIP` check used `startsWith('fe80')` which only matched fe80:: but missed fe90::–febf:: (the rest of the RFC 4291 fe80::/10 link-local block). Replace with a proper bitwise hextet check. * 🛡️ fix: Guard isIPv6LinkLocal against parseInt partial-parse on hostnames parseInt('fe90.example.com', 16) stops at the dot and returns 0xfe90, which passes the bitmask check and false-positives legitimate domains. Add colon-presence guard (IPv6 literals always contain ':') and a hex regex validation on the first hextet before parseInt. Also document why fc/fd use startsWith while fe80::/10 needs bitwise. * ✅ test: Harden IPv6 link-local SSRF tests with false-positive guards - Assert fe90/fea0/febf hostnames are NOT blocked (regression guard) - Add feb0::1 and bracket form [fe90::1] to isPrivateIP coverage - Extend resolveHostnameSSRF tests for fe90::1 and febf::1 |
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