{"id":"EUVD-2026-95419","revision":"c816c24e9e77449aa1855de2326d885c","records":[{"revision":"c816c24e9e77449aa1855de2326d885c","observedAt":"2026-10-30T11:58:12.416+00:00","statement":{"source":"euvd","id":"EUVD-2026-95419","aliases":["CVE-2026-78659"],"title":"When \"Trailer\" headers are sent by a client, the HTTP server internally uses the header values to populate the Request.Trailer map passed to the server handler. Because Request.Trailer is a map, each entry incurs memory overhead. For HTTP/2…","description":"When \"Trailer\" headers are sent by a client, the HTTP server internally uses the header values to populate the Request.Trailer map passed to the server handler. Because Request.Trailer is a map, each entry incurs memory overhead. For HTTP/2 servers, a malicious client can exploit this by sending a \"Trailer\" header that declares a large number of fields, causing the server to allocate a disproportionate amount of memory while bypassing Server.MaxHeaderValueCount and Server.MaxHeaderBytes limits. This exploit is not applicable for HTTP/1 servers, which do not support multiplexing a large number of requests over one TCP connection, and whose Server.MaxHeaderBytes are calculated differently.","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/847185","https://go.dev/cl/847314","https://go.dev/issue/81857","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI","https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs","https://pkg.go.dev/vuln/GO-2026-6603"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95419","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, 3:34:24 PM"},"relatedAdvisories":[{"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-2026:12309-1","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":"RHSA-2026:86196","title":"Red Hat Security Advisory: golang security, bug fix, and enhancement 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media","vulnerabilityIds":["CVE-2026-78659","CVE-2026-78660","CVE-2026-78663","CVE-2026-78669","CVE-2026-97032"]},{"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-2026:12241-1","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-2026:87040","title":"Red Hat Security Advisory: golang security, bug fix, and enhancement 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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-2026:12235-1","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-2026:12242-1","title":"kubevirt1.9-container-disk-1.9.1-2.1 on GA media","vulnerabilityIds":["CVE-2026-78659","CVE-2026-78660","CVE-2026-78669"]},{"id":"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"]}],"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-2026-95419","identifiers":["EUVD-2026-95419","CVE-2026-78659"]},"retained":false,"historicalAffected":[]}],"coverage":[]}