{"id":"BIT-golang-2026-78660","summary":"HTTP/2 transport accepts malformed framing-related headers in net/http","details":"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.","aliases":["CVE-2026-78660","GO-2026-6610"],"modified":"2026-10-16T09:56:04.364467528Z","published":"2026-10-16T08:40:01.867Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*"]},"references":[{"type":"WEB","url":"https://go.dev/cl/835145"},{"type":"WEB","url":"https://go.dev/cl/836385"},{"type":"WEB","url":"https://go.dev/issue/81115"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78660"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-6610"}],"affected":[{"package":{"name":"golang","ecosystem":"Bitnami","purl":"pkg:bitnami/golang"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.26.9"},{"introduced":"1.27.0-0"},{"fixed":"1.27.2"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/golang/BIT-golang-2026-78660.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}],"schema_version":"1.9.0"}