{"id":"EUVD-2026-95425","revision":null,"records":[{"revision":"1a18c479609b41ff8ec990c9b7c3c8b1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-78660","aliases":[],"title":"HTTP/2 transport accepts malformed framing-related headers in net/http","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":"2026-10-08T22:53:59.334+00:00","modifiedAt":"2026-10-09T16:23:56.092+00:00","affected":[{"ecosystem":"https://pkg.go.dev","name":"net/http","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Go standard library\",\n                    \"product\": \"net/http\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"net/http\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.26.9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"http2clientConnReadLoop.handleResponse\"\n                        },\n                        {\n                            \"name\": \"Client.CloseIdleConnections\"\n                        },\n                        {\n                            \"name\": \"Client.Do\"\n                        },\n                        {\n                            \"name\": \"Client.Get\"\n                        },\n                        {\n                            \"name\": \"Client.Head\"\n                        },\n                        {\n                            \"name\": \"Client.Post\"\n                        },\n                        {\n                            \"name\": \"Client.PostForm\"\n                        },\n                        {\n                            \"name\": \"ClientConn.Close\"\n                        },\n                        {\n                            \"name\": \"ClientConn.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"Get\"\n                        },\n                        {\n                            \"name\": \"Head\"\n                        },\n                        {\n                            \"name\": \"Post\"\n                        },\n                        {\n                            \"name\": \"PostForm\"\n                        },\n                        {\n                            \"name\": \"Transport.CloseIdleConnections\"\n                        },\n                        {\n                            \"name\": \"Transport.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"Transport.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"http1ClientConn.Close\"\n                        },\n                        {\n                            \"name\": \"http1ClientConn.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"http2Transport.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"http2Transport.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"http2Transport.RoundTripOpt\"\n                        },\n                        {\n                            \"name\": \"http2clientConnPool.GetClientConn\"\n                        },\n                        {\n                            \"name\": \"http2noDialClientConnPool.GetClientConn\"\n                        },\n                        {\n                            \"name\": \"http2noDialH2RoundTripper.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"http2noDialH2RoundTripper.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"http2unencryptedTransport.RoundTrip\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"https://pkg.go.dev","name":"net/http/internal/http2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Go standard library\",\n                    \"product\": \"net/http/internal/http2\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"net/http/internal/http2\",\n                    \"versions\": [\n                        {\n                            \"version\": \"1.27.0-0\",\n                            \"lessThan\": \"1.27.2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"clientConnReadLoop.handleResponse\"\n                        },\n                        {\n                            \"name\": \"Transport.AddConn\"\n                        },\n                        {\n                            \"name\": \"Transport.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"Transport.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"Transport.RoundTripOpt\"\n                        },\n                        {\n                            \"name\": \"clientConnPool.GetClientConn\"\n                        },\n                        {\n                            \"name\": \"noDialClientConnPool.GetClientConn\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"https://pkg.go.dev","name":"golang.org/x/net/http2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"golang.org/x/net\",\n                    \"product\": \"golang.org/x/net/http2\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"golang.org/x/net/http2\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"0.60.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"clientConnReadLoop.handleResponse\"\n                        },\n                        {\n                            \"name\": \"Transport.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"Transport.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"Transport.RoundTripOpt\"\n                        },\n                        {\n                            \"name\": \"clientConnPool.GetClientConn\"\n                        },\n                        {\n                            \"name\": \"noDialClientConnPool.GetClientConn\"\n                        },\n                        {\n                            \"name\": \"noDialH2RoundTripper.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"noDialH2RoundTripper.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"unencryptedTransport.RoundTrip\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[],"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://www.cve.org/CVERecord?id=CVE-2026-78660","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-78660","identifiers":["CVE-2026-78660"]},"retained":false,"historicalAffected":[]},{"revision":"1724ab92135d43f2b651fa9a0b1ee4fe","observedAt":"2026-11-07T14:30:18.92+00:00","statement":{"source":"euvd","id":"EUVD-2026-95425","aliases":["CVE-2026-78660"],"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":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5,"severity":null}],"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://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95425","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 8, 2026, 10:53:59 PM","dateUpdated":"Oct 9, 2026, 4:23:56 PM"},"relatedAdvisories":[{"id":"SUSE-SU-2026:24237-1","title":"Security update for go1.27","vulnerabilityIds":["CVE-2026-56857","CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032"]},{"id":"openSUSE-SU-2026:12304-1","title":"prometheus-ha_cluster_exporter-1.4.3-1.1 on GA media","vulnerabilityIds":["CVE-2026-78660"]},{"id":"RHSA-2026:86093","title":"Red Hat Security Advisory: golang security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032","CVE-2026-111943"]},{"id":"openSUSE-SU-2026:12101-1","title":"go1.27-1.27.2-1.1 on GA media","vulnerabilityIds":["CVE-2026-56857","CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032"]},{"id":"openSUSE-SU-2026:12235-1","title":"containerized-data-importer1.65-api-1.65.0-4.1 on GA media","vulnerabilityIds":["CVE-2026-61801","CVE-2026-78659","CVE-2026-78660","CVE-2026-78669","CVE-2026-84445"]},{"id":"openSUSE-SU-2026:12207-1","title":"vexctl-0.4.4+git106.aa6ffc8-1.1 on GA media","vulnerabilityIds":["CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78669","CVE-2026-97032"]},{"id":"openSUSE-SU-2026:12112-1","title":"rclone-1.75.2-1.1 on GA media","vulnerabilityIds":["CVE-2026-56857","CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-84445","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032"]},{"id":"RHSA-2026:87245","title":"Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement 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update","vulnerabilityIds":["CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032","CVE-2026-111943"]},{"id":"openSUSE-SU-2026:12242-1","title":"kubevirt1.9-container-disk-1.9.1-2.1 on GA media","vulnerabilityIds":["CVE-2026-78659","CVE-2026-78660","CVE-2026-78669"]},{"id":"RHSA-2026:86196","title":"Red Hat Security Advisory: golang security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032","CVE-2026-111943"]},{"id":"openSUSE-SU-2026:12309-1","title":"timoni-0.36.0-1.1 on GA media","vulnerabilityIds":["CVE-2024-45338","CVE-2025-22872","CVE-2025-47911","CVE-2025-58190","CVE-2026-100351","CVE-2026-100352","CVE-2026-100353","CVE-2026-100354","CVE-2026-33186","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78669","CVE-2026-97032"]},{"id":"SUSE-SU-2026:24475-1","title":"Security update for google-guest-agent","vulnerabilityIds":["CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78669","CVE-2026-97032"]},{"id":"RHSA-2026:87040","title":"Red Hat Security Advisory: golang security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032","CVE-2026-111943"]},{"id":"WID-SEC-W-2026-3841","title":"Golang Go: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2026-56857","CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032"]},{"id":"openSUSE-SU-2026:12241-1","title":"kubevirt1.8-container-disk-1.8.4-7.1 on GA media","vulnerabilityIds":["CVE-2026-56854","CVE-2026-78659","CVE-2026-78660","CVE-2026-78662","CVE-2026-78669","CVE-2026-84303","CVE-2026-84304","CVE-2026-84445"]},{"id":"RHSA-2026:87043","title":"Red Hat Security Advisory: golang security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032","CVE-2026-111943"]},{"id":"openSUSE-SU-2026:12326-1","title":"helm-4.3.1-3.1 on GA media","vulnerabilityIds":["CVE-2026-116591","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-97032"]},{"id":"RHSA-2026:87246","title":"Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2024-45336","CVE-2025-4673","CVE-2025-22866","CVE-2025-22874","CVE-2025-68121","CVE-2026-27137","CVE-2026-27143","CVE-2026-27144","CVE-2026-27145","CVE-2026-32280","CVE-2026-32281","CVE-2026-32282","CVE-2026-32283","CVE-2026-33810","CVE-2026-33811","CVE-2026-33814","CVE-2026-33818","CVE-2026-39820","CVE-2026-39821","CVE-2026-42499","CVE-2026-42504","CVE-2026-56853","CVE-2026-56858","CVE-2026-56859","CVE-2026-56860","CVE-2026-56862","CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032","CVE-2026-111943"]},{"id":"SUSE-SU-2026:24239-1","title":"Security update for go1.26","vulnerabilityIds":["CVE-2026-56857","CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78667","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032"]},{"id":"openSUSE-SU-2026:22095-1","title":"Security update for go1.26","vulnerabilityIds":["CVE-2026-56857","CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78667","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032"]},{"id":"openSUSE-SU-2026:12261-1","title":"git-bug-0.11.0-3.1 on GA media","vulnerabilityIds":["CVE-2026-110095","CVE-2026-110180","CVE-2026-110306","CVE-2026-110725","CVE-2026-110816","CVE-2026-111756","CVE-2026-112085","CVE-2026-112366","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78669","CVE-2026-97032"]},{"id":"RHSA-2026:90994","title":"Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2024-45336","CVE-2025-22866","CVE-2025-22874","CVE-2025-68121","CVE-2026-27137","CVE-2026-27143","CVE-2026-27144","CVE-2026-27145","CVE-2026-32280","CVE-2026-32281","CVE-2026-32282","CVE-2026-32283","CVE-2026-33810","CVE-2026-33811","CVE-2026-33814","CVE-2026-33818","CVE-2026-39820","CVE-2026-39821","CVE-2026-42499","CVE-2026-42504","CVE-2026-56853","CVE-2026-56858","CVE-2026-56859","CVE-2026-56860","CVE-2026-56862","CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032","CVE-2026-111943"]},{"id":"openSUSE-SU-2026:12093-1","title":"go1.26-1.26.9-1.1 on GA media","vulnerabilityIds":["CVE-2026-56857","CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78667","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032"]},{"id":"RHSA-2026:87041","title":"Red Hat Security Advisory: golang security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032","CVE-2026-111943"]},{"id":"openSUSE-SU-2026:22093-1","title":"Security update for go1.27","vulnerabilityIds":["CVE-2026-56857","CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032"]},{"id":"openSUSE-SU-2026:12320-1","title":"fleet-cli-0.16.3-1.1 on GA media","vulnerabilityIds":["CVE-2026-111943","CVE-2026-78659","CVE-2026-78660"]},{"id":"RHSA-2026:86203","title":"Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement update","vulnerabilityIds":["CVE-2026-56866","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78667","CVE-2026-78669","CVE-2026-94439","CVE-2026-94440","CVE-2026-94444","CVE-2026-94447","CVE-2026-94448","CVE-2026-97030","CVE-2026-97031","CVE-2026-97032","CVE-2026-111943"]},{"id":"openSUSE-SU-2026:12283-1","title":"distribution-registry-3.1.2-3.1 on GA media","vulnerabilityIds":["CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-9703"]},{"id":"openSUSE-SU-2026:22180-1","title":"Security update for kubevirt1.9","vulnerabilityIds":["CVE-2026-13622","CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78669","CVE-2026-97032"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-95425","identifiers":["EUVD-2026-95425","CVE-2026-78660"]},"retained":false,"historicalAffected":[]},{"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. 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