{"id":"CVE-2026-78660","revision":"17aca7c55a0d43bd87bdb11ce2506842","records":[{"revision":"17aca7c55a0d43bd87bdb11ce2506842","observedAt":"2026-10-25T16:19:04.694+00:00","statement":{"source":"nvd","id":"CVE-2026-78660","aliases":[],"title":"Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses con…","description":"Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling.","state":0,"publishedAt":"2026-10-08T23:17:03.51+00:00","modifiedAt":"2026-10-09T17:16:49.243+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:H/A:N","score":7.5,"severity":"HIGH"}],"references":["https://go.dev/cl/835145","https://go.dev/cl/836385","https://go.dev/issue/81115","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI","https://pkg.go.dev/vuln/GO-2026-6610"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78660","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-444"],"productCriteria":[],"sourceDates":{"published":"2026-10-08T23:17:03.510","lastModified":"2026-10-09T17:16:49.243"},"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-2026-78660","identifiers":["CVE-2026-78660"]},"retained":false,"historicalAffected":[]}],"coverage":[]}