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curl: no_proxy IDN mismatch: Unicode hostnames bypass proxy exclusion list

🗓️ 05 Apr 2026 06:17:00Reported by mzfrType 
hackerone
 hackerone🔗 hackerone.com👁 10 Views

Unicode domain names in no_proxy are not punycode-converted, causing proxy bypass to fail in curl.

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07 Apr 2026 06:24Current
6.6Medium risk
Vulners AI Score6.6
CVSS 3.17.5
EPSS0.00048
SSVC
internationalized domain namepunycode mismatchno_proxy bypasscurl proxy issueunicode hostname
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