{"id":"UBUNTU-CVE-2026-10725","details":"Protocol::HTTP2 versions before 1.13 for Perl is vulnerable to a HTTP/2 Bomb. Protocol::HTTP2's inbound HPACK path has no header-list size limit, so a small HTTP/2 request can expand into large server memory (the \"HTTP/2 bomb\"). The headers_decode method materialises a full key+value copy per indexed reference with no running size check, and the stream_header_block_add method appends (since version 1.12) every CONTINUATION frame to the per-stream buffer unbounded. MAX_HEADER_LIST_SIZE (default 65536) is advertised in SETTINGS but never consulted on decode.  It is absent from the decoder and from the :limits export tag.","modified":"2026-06-12T09:04:03.098187553Z","published":"2026-06-06T10:16:00Z","upstream":["CVE-2026-10725"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-10725"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-10725"},{"type":"REPORT","url":"https://lists.security.metacpan.org/cve-announce/msg/40751319/"},{"type":"REPORT","url":"https://security.metacpan.org/patches/P/Protocol-HTTP2/1.12/CVE-2026-10725-r1.patch"},{"type":"REPORT","url":"https://metacpan.org/release/CRUX/Protocol-HTTP2-1.12/source/lib/Protocol/HTTP2/HeaderCompression.pm#L133"},{"type":"REPORT","url":"https://metacpan.org/release/CRUX/Protocol-HTTP2-1.12/source/lib/Protocol/HTTP2/Stream.pm#L414"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2026/06/06/7"}],"affected":[{"package":{"name":"libprotocol-http2-perl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libprotocol-http2-perl?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.08-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.08-1","binary_name":"libprotocol-http2-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10725.json"}},{"package":{"name":"libprotocol-http2-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libprotocol-http2-perl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.09-1","1.10-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libprotocol-http2-perl","binary_version":"1.10-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10725.json"}},{"package":{"name":"libprotocol-http2-perl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libprotocol-http2-perl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libprotocol-http2-perl","binary_version":"1.10-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10725.json"}},{"package":{"name":"libprotocol-http2-perl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libprotocol-http2-perl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libprotocol-http2-perl","binary_version":"1.10-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10725.json"}},{"package":{"name":"libprotocol-http2-perl","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libprotocol-http2-perl?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.11-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libprotocol-http2-perl","binary_version":"1.11-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10725.json"}},{"package":{"name":"libprotocol-http2-perl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libprotocol-http2-perl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.11-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.11-1","binary_name":"libprotocol-http2-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10725.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"}]}