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Package · Ubuntu

h2o

20 known vulnerabilities.

All Critical High Medium Low Exploited only Public exploit

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  • High 7.5
    CVE-2025-8671 Public exploit

    CVE-2025-8671

    A mismatch caused by client-triggered server-sent stream resets between HTTP/2 specifications and the internal architectures of some HTTP/2 implementations may result in excessive server resource consumption leading to denial-of-service (DoS). By opening stre…

    varnish-software Wind River Systems Fastly SUSE Linux Linux Debian Ubuntu Alpine crates.io
  • High 7.5
    CVE-2023-44487 Exploited Public exploit EPSS 100%

    HTTP/2 Stream Cancellation Attack

    The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

    nodejs golang go kubescape Debian Ubuntu Azure Linux Alpine Wolfi Maven Go SwiftURL
    KEV Oct 10, 2023
  • High 7.4
    CVE-2021-43848 Public exploit

    Unititialized memory access in h2o

    h2o is an open source http server. In code prior to the `8c0eca3` commit h2o may attempt to access uninitialized memory. When receiving QUIC frames in certain order, HTTP/3 server-side implementation of h2o can be misguided to treat uninitialized memory as HT…

    h2o h2o h2o Ubuntu