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    CVE-2026-58055 nghttpx Request Smuggling: Upgrade + Content-Length Desync Risk

    CVE-2026-58055 is a newly published medium-severity vulnerability in nghttp2’s nghttpx proxy, disclosed on June 27, 2026, affecting versions through 1.69.0 and allowing HTTP request/response smuggling when an Upgrade request with Content-Length is forwarded to reusable backend connections. The...
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    • cve-2026-58055 http proxy security nghttpx request smuggling
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    • Forum: Security Alerts
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