{"id":"UBUNTU-CVE-2026-14741","details":"HTTP::Date versions before 6.08 for Perl allow CPU exhaustion via polynomial regex backtracking in parse_date. parse_date() matches the date string against a chain of alternative regexes, and str2time() delegates to it. Several of these patterns place unbounded quantifiers next to each other before a trailing `\\s*$` anchor. A valid date prefix followed by a long interior run of digits, letters, or whitespace and a single trailing byte that defeats the final match forces the engine to repartition the run, giving polynomial (about quadratic) backtracking. A header value of a few tens of kilobytes runs for tens of seconds of CPU. HTTP::Date parses timestamps such as HTTP `Date`, `Expires`, and `Last-Modified` headers, which commonly originate from untrusted sources. Any caller that passes an untrusted date header to str2time() or parse_date() can be driven to consume unbounded CPU, a denial of service.","modified":"2026-07-29T10:15:38.793979968Z","published":"2026-07-10T00:00:00Z","related":["USN-8599-1"],"upstream":["CVE-2026-14741"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-14741"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-14741"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8599-1"}],"affected":[{"package":{"name":"libhttp-date-perl","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libhttp-date-perl?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.02-1"],"ecosystem_specific":{"binaries":[{"binary_version":"6.02-1","binary_name":"libhttp-date-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14741.json"}},{"package":{"name":"libhttp-date-perl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libhttp-date-perl?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.02-1"],"ecosystem_specific":{"binaries":[{"binary_version":"6.02-1","binary_name":"libhttp-date-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14741.json"}},{"package":{"name":"libhttp-date-perl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libhttp-date-perl?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.02-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttp-date-perl","binary_version":"6.02-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14741.json"}},{"package":{"name":"libhttp-date-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libhttp-date-perl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.02-1","6.05-1"],"ecosystem_specific":{"binaries":[{"binary_version":"6.05-1","binary_name":"libhttp-date-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14741.json"}},{"package":{"name":"libhttp-date-perl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libhttp-date-perl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.05-1ubuntu0.1"}]}],"versions":["6.05-1"],"ecosystem_specific":{"binaries":[{"binary_version":"6.05-1ubuntu0.1","binary_name":"libhttp-date-perl"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14741.json"}},{"package":{"name":"libhttp-date-perl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libhttp-date-perl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.06-1ubuntu0.24.04.1"}]}],"versions":["6.05-2","6.06-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttp-date-perl","binary_version":"6.06-1ubuntu0.24.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14741.json"}},{"package":{"name":"libhttp-date-perl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libhttp-date-perl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.06-1ubuntu0.26.04.1"}]}],"versions":["6.06-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libhttp-date-perl","binary_version":"6.06-1ubuntu0.26.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14741.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"}]}