{"id":"CVE-2026-97032","state":"PUBLISHED","title":"HTTP/2 server crash due to HPACK encoder race in net/http","description":"HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABLE_SIZE that a client sends. A malicious client can repeatedly send a request while changing the header table size to crash the server.","publishedAt":"2026-10-08T22:54:00.230Z","updatedAt":"2026-10-15T15:46:39.417Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Go","products":["Go standard library net/http","Go standard library net/http/internal/http2","golang.org/x/net golang.org/x/net/http2"],"affected":[{"vendor":"Go standard 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This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABLE_SIZE that a client sends. 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