{"id":"EUVD-2026-95427","revision":"6e4d9a32392448d68c10ac22be8fb05f","records":[{"revision":"6e4d9a32392448d68c10ac22be8fb05f","observedAt":"2026-10-30T11:58:21.353+00:00","statement":{"source":"euvd","id":"EUVD-2026-95427","aliases":["CVE-2026-78663"],"title":"The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a request handler reads the buffered data.…","description":"The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a request handler reads the buffered data. A malicious client can exploit this to bypass the configured connection-level flow control limit (MaxReceiveBufferPerConnection). Total buffered data is still limited by the concurrent stream limit and stream-level flow control.","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:H","score":9.1,"severity":null}],"references":["https://go.dev/cl/847187","https://go.dev/cl/847310","https://go.dev/issue/81743","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI","https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs","https://pkg.go.dev/vuln/GO-2026-6612"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95427","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, 4:42:50 PM"},"relatedAdvisories":[{"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-2026:12286-1","title":"google-guest-agent-20261022.00-1.1 on GA media","vulnerabilityIds":["CVE-2026-78659","CVE-2026-78663"]},{"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-2026:12214-1","title":"kyverno-1.19.2-1.1 on GA media","vulnerabilityIds":["CVE-2026-78663","CVE-2026-97031","CVE-2026-97032"]},{"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":"RHSA-2026:87042","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":"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":"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-2026:12101-1","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-2026:12287-1","title":"google-osconfig-agent-20261022.00-1.1 on GA media","vulnerabilityIds":["CVE-2026-78659","CVE-2026-78663"]},{"id":"openSUSE-SU-2026:12267-1","title":"amazon-cloudwatch-agent-1.300073.2-2.1 on GA media","vulnerabilityIds":["CVE-2026-78659","CVE-2026-78663"]},{"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-2026:86196","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":"SUSE-SU-2026:24359-1","title":"Security update for go1.26","vulnerabilityIds":["CVE-2026-111943","CVE-2026-78663","CVE-2026-78669"]},{"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-2026:12309-1","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":"openSUSE-SU-2026:12293-1","title":"hugo-0.168.0-3.1 on GA media","vulnerabilityIds":["CVE-2026-78663"]},{"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-2026:22152-1","title":"Security update for go1.26","vulnerabilityIds":["CVE-2026-111943","CVE-2026-78663","CVE-2026-78669"]},{"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":"openSUSE-SU-2026:12212-1","title":"go1.26-1.26.10-1.1 on GA media","vulnerabilityIds":["CVE-2026-111943","CVE-2026-78663","CVE-2026-78669"]},{"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-2026:12268-1","title":"azure-storage-azcopy-10.34.1-1.1 on GA media","vulnerabilityIds":["CVE-2026-78659","CVE-2026-78663"]},{"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":"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":"RHSA-2026:87245","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"]}],"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-2026-95427","identifiers":["EUVD-2026-95427","CVE-2026-78663"]},"retained":false,"historicalAffected":[]}],"coverage":[]}