{"id":"UBUNTU-CVE-2026-54428","details":"Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement causes the configured header list size limit to be applied.","modified":"2026-07-09T15:21:03Z","published":"2026-07-01T18:16:00Z","upstream":["CVE-2026-54428"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-54428"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-54428"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2026/07/01/3"},{"type":"REPORT","url":"https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2026/07/01/3"}],"affected":[{"package":{"name":"httpcomponents-core","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-core?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.4-1","4.3-1","4.3.1-1","4.3.2-1","4.3.2-2"],"ecosystem_specific":{"binaries":[{"binary_version":"4.3.2-2","binary_name":"libhttpcore-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-core?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.1-1","4.4.3-1","4.4.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpcore-java","binary_version":"4.4.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-core?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.7-1","4.4.8-1","4.4.9-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpcore-java","binary_version":"4.4.9-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-core?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.11-1","4.4.12-1","4.4.13-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpcore-java","binary_version":"4.4.13-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-core?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.14-1","4.4.14-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpcore-java","binary_version":"4.4.14-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core5","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-core5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.1.2-1","5.1.2-2","5.1.3-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpcore5-java","binary_version":"5.1.3-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-core?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.16-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpcore-java","binary_version":"4.4.16-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core5","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-core5?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.1-1","5.2.2-1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.2.2-1","binary_name":"libhttpcore5-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/httpcomponents-core?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.16-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpcore-java","binary_version":"4.4.16-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core5","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/httpcomponents-core5?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.2-1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.2.2-1","binary_name":"libhttpcore5-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-core?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.16-1","4.4.16-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpcore-java","binary_version":"4.4.16-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}},{"package":{"name":"httpcomponents-core5","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-core5?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.2-1","5.2.2-2","5.4-1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.4-1","binary_name":"libhttpcore5-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54428.json"}}],"schema_version":"1.7.5","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":"Ubuntu","score":"medium"}]}