{"id":"CVE-2026-56853","revision":"0cb9e2c6fcef419384ce984e11c52775","records":[{"revision":"0cb9e2c6fcef419384ce984e11c52775","observedAt":"2026-10-25T14:19:10.848+00:00","statement":{"source":"nvd","id":"CVE-2026-56853","aliases":[],"title":"When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.","description":"When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.","state":0,"publishedAt":"2026-08-13T22:17:22.093+00:00","modifiedAt":"2026-09-03T16:37:52.17+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://go.dev/cl/795540","https://go.dev/issue/80205","https://groups.google.com/g/golang-announce/c/94pEornpRlI","https://pkg.go.dev/vuln/GO-2026-6089"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56853","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-770"],"productCriteria":[],"sourceDates":{"published":"2026-08-13T22:17:22.093","lastModified":"2026-09-03T16:37:52.170"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-56853","identifiers":["CVE-2026-56853"]},"retained":false,"historicalAffected":[]}],"coverage":[]}