CVE-2026-97032
highHTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://go.dev/cl/847188 security@golang.org
- https://go.dev/cl/847313 security@golang.org
- https://go.dev/issue/81867 security@golang.org
- https://groups.google.com/g/golang-announce/c/U2fTuyDJznI security@golang.org
- https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs security@golang.org
- https://pkg.go.dev/vuln/GO-2026-6617 security@golang.org