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Product · python-hyper

h2

2 known vulnerabilities.

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  • Medium 5.3
    CVE-2026-71554 Public exploit

    h2: Duplicate Host header could facilitate request smuggling

    h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP…

    python-hyper h2 python-h2 h2 Debian Ubuntu PyPI