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Vulnerabilities of Go standard library net/http/internal/http2

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CVE Summary Score Published
CVE-2026-97032 HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently 7.5 High Oct 8, 2026
CVE-2026-78660 Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they… 7.5 High Oct 8, 2026
CVE-2026-78663 The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream… 9.1 Critical Oct 8, 2026
CVE-2026-78669 A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams… 7.5 High Oct 8, 2026
CVE-2026-78659 When "Trailer" headers are sent by a client, the HTTP server internally uses the header values to populate the… 7.5 High Oct 8, 2026
CVE-2026-39821 The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label 9.6 Critical May 22, 2026

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