{"id":"USN-8233-1","summary":"nghttp2 vulnerability","details":"Andrew MacPherson discovered that nghttp2 did not properly validate\ninternal state when the session termination API was called. A remote\nattacker could possibly use this issue to cause nghttp2 to crash, resulting\nin a denial of service.","modified":"2026-06-30T18:15:56.558210825Z","published":"2026-05-05T17:07:33Z","related":["UBUNTU-CVE-2026-27135"],"upstream":["UBUNTU-CVE-2026-27135"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8233-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-27135"}],"affected":[{"package":{"name":"nghttp2","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/nghttp2?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.1-1ubuntu0.1~esm3"}]}],"versions":["0.6.7-1","1.3.4-2","1.4.0-1","1.4.0-2","1.5.0-2","1.6.0-1","1.7.0-1","1.7.1-1","1.7.1-1ubuntu0.1~esm1","1.7.1-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.7.1-1ubuntu0.1~esm3","binary_name":"libnghttp2-14"},{"binary_version":"1.7.1-1ubuntu0.1~esm3","binary_name":"nghttp2"},{"binary_name":"nghttp2-client","binary_version":"1.7.1-1ubuntu0.1~esm3"},{"binary_name":"nghttp2-proxy","binary_version":"1.7.1-1ubuntu0.1~esm3"},{"binary_name":"nghttp2-server","binary_version":"1.7.1-1ubuntu0.1~esm3"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8233-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2026-27135","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}]}}},{"package":{"name":"nghttp2","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/nghttp2?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.30.0-1ubuntu1+esm3"}]}],"versions":["1.25.0-1","1.27.0-1","1.28.0-1","1.29.0-1","1.29.0-1build1","1.30.0-1","1.30.0-1ubuntu1","1.30.0-1ubuntu1+esm1","1.30.0-1ubuntu1+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.30.0-1ubuntu1+esm3","binary_name":"libnghttp2-14"},{"binary_name":"nghttp2","binary_version":"1.30.0-1ubuntu1+esm3"},{"binary_name":"nghttp2-client","binary_version":"1.30.0-1ubuntu1+esm3"},{"binary_version":"1.30.0-1ubuntu1+esm3","binary_name":"nghttp2-proxy"},{"binary_name":"nghttp2-server","binary_version":"1.30.0-1ubuntu1+esm3"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-27135"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8233-1.json"}},{"package":{"name":"nghttp2","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/nghttp2?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.40.0-1ubuntu0.3+esm1"}]}],"versions":["1.39.2-1","1.40.0-1","1.40.0-1build1","1.40.0-1ubuntu0.1","1.40.0-1ubuntu0.2","1.40.0-1ubuntu0.3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.40.0-1ubuntu0.3+esm1","binary_name":"libnghttp2-14"},{"binary_name":"nghttp2","binary_version":"1.40.0-1ubuntu0.3+esm1"},{"binary_name":"nghttp2-client","binary_version":"1.40.0-1ubuntu0.3+esm1"},{"binary_name":"nghttp2-proxy","binary_version":"1.40.0-1ubuntu0.3+esm1"},{"binary_name":"nghttp2-server","binary_version":"1.40.0-1ubuntu0.3+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-27135"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8233-1.json"}},{"package":{"name":"nghttp2","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/nghttp2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.43.0-1ubuntu0.3"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"libnghttp2-14","binary_version":"1.43.0-1ubuntu0.3"},{"binary_name":"nghttp2","binary_version":"1.43.0-1ubuntu0.3"},{"binary_name":"nghttp2-client","binary_version":"1.43.0-1ubuntu0.3"},{"binary_version":"1.43.0-1ubuntu0.3","binary_name":"nghttp2-proxy"},{"binary_name":"nghttp2-server","binary_version":"1.43.0-1ubuntu0.3"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8233-1.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-27135","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}]}]}}},{"package":{"name":"nghttp2","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/nghttp2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.59.0-1ubuntu0.3"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.59.0-1ubuntu0.3","binary_name":"libnghttp2-14"},{"binary_name":"nghttp2","binary_version":"1.59.0-1ubuntu0.3"},{"binary_name":"nghttp2-client","binary_version":"1.59.0-1ubuntu0.3"},{"binary_version":"1.59.0-1ubuntu0.3","binary_name":"nghttp2-proxy"},{"binary_version":"1.59.0-1ubuntu0.3","binary_name":"nghttp2-server"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8233-1.json","cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"id":"CVE-2026-27135","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}]}}},{"package":{"name":"nghttp2","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/nghttp2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.64.0-1.1ubuntu1.1"}]}],"versions":["1.64.0-1ubuntu1","1.64.0-1.1","1.64.0-1.1build1","1.64.0-1.1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnghttp2-14","binary_version":"1.64.0-1.1ubuntu1.1"},{"binary_name":"nghttp2","binary_version":"1.64.0-1.1ubuntu1.1"},{"binary_name":"nghttp2-client","binary_version":"1.64.0-1.1ubuntu1.1"},{"binary_name":"nghttp2-proxy","binary_version":"1.64.0-1.1ubuntu1.1"},{"binary_version":"1.64.0-1.1ubuntu1.1","binary_name":"nghttp2-server"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:25.10","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-27135"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8233-1.json"}}],"schema_version":"1.7.5"}