{"id":"USN-8495-1","summary":"nghttp2 vulnerability","details":"It was discovered that the nghttp2 nghttpx proxy incorrectly handled\nHTTP/1.1 Upgrade requests that included a Content-Length header and body.\nA remote attacker could possibly use this issue to perform HTTP request and\nresponse smuggling attacks against backend services.","modified":"2026-07-02T18:14:13.901189680Z","published":"2026-07-02T13:57:53Z","related":["UBUNTU-CVE-2026-58055"],"upstream":["CVE-2026-58055","UBUNTU-CVE-2026-58055"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8495-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-58055"}],"affected":[{"package":{"name":"nghttp2","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/nghttp2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.43.0-1ubuntu0.4"}]}],"versions":["1.43.0-1","1.43.0-1build1","1.43.0-1build2","1.43.0-1build3","1.43.0-1ubuntu0.1","1.43.0-1ubuntu0.2","1.43.0-1ubuntu0.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.43.0-1ubuntu0.4","binary_name":"libnghttp2-14"},{"binary_name":"nghttp2","binary_version":"1.43.0-1ubuntu0.4"},{"binary_name":"nghttp2-client","binary_version":"1.43.0-1ubuntu0.4"},{"binary_version":"1.43.0-1ubuntu0.4","binary_name":"nghttp2-proxy"},{"binary_name":"nghttp2-server","binary_version":"1.43.0-1ubuntu0.4"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-58055","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"},{"score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N","type":"CVSS_V4"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8495-1.json"}},{"package":{"name":"nghttp2","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/nghttp2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.59.0-1ubuntu0.4"}]}],"versions":["1.55.1-1","1.57.0-1","1.58.0-1","1.59.0-1","1.59.0-1build1","1.59.0-1build2","1.59.0-1build4","1.59.0-1ubuntu0.1","1.59.0-1ubuntu0.2","1.59.0-1ubuntu0.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnghttp2-14","binary_version":"1.59.0-1ubuntu0.4"},{"binary_version":"1.59.0-1ubuntu0.4","binary_name":"nghttp2"},{"binary_version":"1.59.0-1ubuntu0.4","binary_name":"nghttp2-client"},{"binary_name":"nghttp2-proxy","binary_version":"1.59.0-1ubuntu0.4"},{"binary_version":"1.59.0-1ubuntu0.4","binary_name":"nghttp2-server"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8495-1.json","cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","type":"CVSS_V3"},{"score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N","type":"CVSS_V4"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-58055"}]}}},{"package":{"name":"nghttp2","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/nghttp2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.64.0-1.1ubuntu1.2"}]}],"versions":["1.64.0-1ubuntu1","1.64.0-1.1","1.64.0-1.1build1","1.64.0-1.1ubuntu1","1.64.0-1.1ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnghttp2-14","binary_version":"1.64.0-1.1ubuntu1.2"},{"binary_version":"1.64.0-1.1ubuntu1.2","binary_name":"nghttp2"},{"binary_name":"nghttp2-client","binary_version":"1.64.0-1.1ubuntu1.2"},{"binary_name":"nghttp2-proxy","binary_version":"1.64.0-1.1ubuntu1.2"},{"binary_name":"nghttp2-server","binary_version":"1.64.0-1.1ubuntu1.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8495-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-58055"}],"ecosystem":"Ubuntu:25.10"}}},{"package":{"name":"nghttp2","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/nghttp2?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.68.0-2ubuntu0.2"}]}],"versions":["1.64.0-1.1ubuntu1","1.64.0-1.1ubuntu2","1.68.0-1","1.68.0-2","1.68.0-2ubuntu0.1"],"ecosystem_specific":{"availability":"No subscription 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