{"id":"EUVD-2026-95422","revision":null,"records":[{"revision":"bd28beca175c4ac0ab7ab6cb7a1c7cd2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-97031","aliases":[],"title":"Reject malformed ECH outer extension references in crypto/tls","description":"Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject these as malformed and curb the memory amplification vector as a result.","state":0,"publishedAt":"2026-10-08T22:53:58.775+00:00","modifiedAt":"2026-10-09T15:59:17.238+00:00","affected":[{"ecosystem":"https://pkg.go.dev","name":"crypto/tls","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Go standard library\",\n                    \"product\": \"crypto/tls\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"crypto/tls\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.26.9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\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\": \"decodeInnerClientHello\"\n                        },\n                        {\n                            \"name\": \"Conn.Handshake\"\n                        },\n                        {\n                            \"name\": \"Conn.HandshakeContext\"\n                        },\n                        {\n                            \"name\": \"Conn.Read\"\n                        },\n                        {\n                            \"name\": \"Conn.Write\"\n                        },\n                        {\n                            \"name\": \"Dial\"\n                        },\n                        {\n                            \"name\": \"DialWithDialer\"\n                        },\n                        {\n                            \"name\": \"Dialer.Dial\"\n                        },\n                        {\n                            \"name\": \"Dialer.DialContext\"\n                        },\n                        {\n                            \"name\": \"QUICConn.Start\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[],"references":["https://go.dev/cl/847312","https://go.dev/issue/81855","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI","https://pkg.go.dev/vuln/GO-2026-6607"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97031","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-97031","identifiers":["CVE-2026-97031"]},"retained":false,"historicalAffected":[]},{"revision":"727a21f1ebe74400a1cc7537c3d84a46","observedAt":"2026-11-07T15:27:27.524+00:00","statement":{"source":"euvd","id":"EUVD-2026-95422","aliases":["CVE-2026-97031","GHSA-hq7w-2xrq-wp2j"],"title":"Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject thes…","description":"Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject these as malformed and curb the memory amplification vector as a result.","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:N/A:H","score":7.5,"severity":null}],"references":["https://go.dev/cl/847312","https://go.dev/issue/81855","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI","https://pkg.go.dev/vuln/GO-2026-6607"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95422","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 8, 2026, 10:53:58 PM","dateUpdated":"Oct 9, 2026, 3:59:17 PM"},"relatedAdvisories":[{"id":"RHSA-2026:92480","title":"Red Hat Security Advisory: Red Hat OpenShift Service Mesh 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opentelemetry-collector security update","vulnerabilityIds":["CVE-2026-78667","CVE-2026-78669","CVE-2026-94440","CVE-2026-97031","CVE-2026-111943"]},{"id":"RHSA-2026:90725","title":"Red Hat Security Advisory: rhc security update","vulnerabilityIds":["CVE-2024-9355","CVE-2024-45336","CVE-2025-68121","CVE-2026-27145","CVE-2026-32280","CVE-2026-32282","CVE-2026-32283","CVE-2026-33811","CVE-2026-33818","CVE-2026-39821","CVE-2026-42504","CVE-2026-56858","CVE-2026-56860","CVE-2026-56862","CVE-2026-78667","CVE-2026-78669","CVE-2026-97031","CVE-2026-111943"]},{"id":"RHSA-2026:88340","title":"Red Hat Security Advisory: grafana security 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Hat Security Advisory: grafana-pcp security update","vulnerabilityIds":["CVE-2026-78669","CVE-2026-94440","CVE-2026-97031","CVE-2026-111943"]},{"id":"RHSA-2026:90332","title":"Red Hat Security Advisory: RHOSO 18.0 os-diff security update","vulnerabilityIds":["CVE-2026-27145","CVE-2026-33818","CVE-2026-42504","CVE-2026-56853","CVE-2026-56858","CVE-2026-56860","CVE-2026-56862","CVE-2026-78667","CVE-2026-78669","CVE-2026-94440","CVE-2026-97031","CVE-2026-111943"]},{"id":"RHSA-2026:89888","title":"Red Hat Security Advisory: delve security update","vulnerabilityIds":["CVE-2026-78667","CVE-2026-78669","CVE-2026-94440","CVE-2026-97031","CVE-2026-111943"]},{"id":"RHSA-2026:87042","title":"Red Hat Security Advisory: golang 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":"RHSA-2026:89914","title":"Red Hat Security Advisory: rhc security update","vulnerabilityIds":["CVE-2026-78667","CVE-2026-78669","CVE-2026-97031","CVE-2026-111943"]},{"id":"RHSA-2026:86972","title":"Red Hat Security Advisory: grafana-pcp security update","vulnerabilityIds":["CVE-2026-78667","CVE-2026-78669","CVE-2026-94440","CVE-2026-97031","CVE-2026-111943"]},{"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-2026:90994","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":"RHSA-2026:88339","title":"Red Hat Security Advisory: grafana security update","vulnerabilityIds":["CVE-2024-45336","CVE-2025-22866","CVE-2025-68121","CVE-2026-27137","CVE-2026-32280","CVE-2026-32281","CVE-2026-32282","CVE-2026-32283","CVE-2026-33810","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-2026-78667","CVE-2026-78669","CVE-2026-94440","CVE-2026-97031","CVE-2026-111943"]},{"id":"RHSA-2026:88396","title":"Red Hat Security Advisory: grafana security update","vulnerabilityIds":["CVE-2026-78667","CVE-2026-78669","CVE-2026-97031","CVE-2026-111943"]},{"id":"RHSA-2026:92859","title":"Red Hat Security Advisory: Satellite 6.17 security update","vulnerabilityIds":["CVE-2026-8924","CVE-2026-18660","CVE-2026-19203","CVE-2026-56852","CVE-2026-59646","CVE-2026-63072","CVE-2026-63076","CVE-2026-68494","CVE-2026-68497","CVE-2026-78667","CVE-2026-78669","CVE-2026-84445","CVE-2026-89407","CVE-2026-89425","CVE-2026-94440","CVE-2026-97031","CVE-2026-111943"]},{"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":"RHSA-2026:88317","title":"Red Hat Security Advisory: grafana-pcp security update","vulnerabilityIds":["CVE-2026-78667","CVE-2026-78669","CVE-2026-94440","CVE-2026-97031","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-2026-95422","identifiers":["EUVD-2026-95422","CVE-2026-97031","GHSA-hq7w-2xrq-wp2j"]},"retained":false,"historicalAffected":[]},{"revision":"e6fb8d486ec74b2eb2c9b156d3e44bd0","observedAt":"2026-10-25T16:19:28.255+00:00","statement":{"source":"nvd","id":"CVE-2026-97031","aliases":[],"title":"Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject thes…","description":"Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject these as malformed and curb the memory amplification vector as a result.","state":0,"publishedAt":"2026-10-08T23:17:06.037+00:00","modifiedAt":"2026-10-09T16:35:35.9+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/847312","https://go.dev/issue/81855","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI","https://pkg.go.dev/vuln/GO-2026-6607"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97031","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-405"],"productCriteria":[],"sourceDates":{"published":"2026-10-08T23:17:06.037","lastModified":"2026-10-09T16:35:35.900"},"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-2026-97031","identifiers":["CVE-2026-97031"]},"retained":false,"historicalAffected":[]},{"revision":"228e4af918374743ac5b03841b82968b","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6607","aliases":["BIT-golang-2026-97031","CVE-2026-97031"],"title":"Reject malformed ECH outer extension references in crypto/tls","description":"Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references.\n\nWe now reject these as malformed and curb the memory amplification vector as a result.","state":0,"publishedAt":"2026-10-08T22:31:09+00:00","modifiedAt":"2026-10-16T09:55:33.2497429+00:00","affected":[{"ecosystem":"Go","name":"stdlib","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.26.9"},{"kind":"introduced","version":"1.27.0-0"},{"kind":"fixed","version":"1.27.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://go.dev/cl/847312","https://go.dev/issue/81855","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6607","license":"OSV · upstream source license applies","key":"osv:GO-2026-6607","identifiers":["GO-2026-6607","BIT-golang-2026-97031","CVE-2026-97031"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T12:02:21.9910047+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-09T12:02:21.9910047+00:00","lastSuccessAt":"2026-11-09T12:02:22.1773794+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:22.1773831+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-bc5670b92e6417137e6d98178f734a585c0efdac3c24cdab996a156ba398735b","complete":true,"records":421397,"lastAttemptAt":"2026-11-09T12:02:16.4943065+00:00","lastSuccessAt":"2026-11-09T12:02:16.4102763+00:00","error":null,"lastVerifiedAt":"2026-11-09T12:02:16.4943065+00:00","snapshotPublishedAt":"2026-11-09T11:21:04+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. 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