{"id":"UBUNTU-CVE-2025-4035","details":"A flaw was found in libsoup. When handling cookies, libsoup clients mistakenly allow cookies to be set for public suffix domains if the domain contains at least two components and includes an uppercase character. This bypasses public suffix protections and could allow a malicious website to set cookies for domains it does not own, potentially leading to integrity issues such as session fixation.","modified":"2026-09-18T01:00:04.538966971Z","published":"2025-04-29T13:15:00Z","upstream":["CVE-2025-4035"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-4035"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-4035"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2025-4035"}],"affected":[{"package":{"name":"libsoup2.4","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libsoup2.4?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.50.0-2debian1","2.52.1-1","2.52.2-1","2.52.2-1ubuntu0.1","2.52.2-1ubuntu0.2","2.52.2-1ubuntu0.3","2.52.2-1ubuntu0.3+esm1","2.52.2-1ubuntu0.3+esm2","2.52.2-1ubuntu0.3+esm3","2.52.2-1ubuntu0.3+esm4","2.52.2-1ubuntu0.3+esm5","2.52.2-1ubuntu0.3+esm6","2.52.2-1ubuntu0.3+esm7"],"ecosystem_specific":{"binaries":[{"binary_version":"2.52.2-1ubuntu0.3+esm7","binary_name":"gir1.2-soup-2.4"},{"binary_name":"libsoup-gnome2.4-1","binary_version":"2.52.2-1ubuntu0.3+esm7"},{"binary_name":"libsoup2.4-1","binary_version":"2.52.2-1ubuntu0.3+esm7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}},{"package":{"name":"libsoup2.4","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libsoup2.4?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.60.1-1","2.60.2-1","2.60.2-2","2.60.3-1","2.61.90-1","2.62.0-1","2.62.1-1","2.62.1-1ubuntu0.1","2.62.1-1ubuntu0.3","2.62.1-1ubuntu0.4","2.62.1-1ubuntu0.4+esm1","2.62.1-1ubuntu0.4+esm2","2.62.1-1ubuntu0.4+esm3","2.62.1-1ubuntu0.4+esm4","2.62.1-1ubuntu0.4+esm5","2.62.1-1ubuntu0.4+esm6","2.62.1-1ubuntu0.4+esm7","2.62.1-1ubuntu0.4+esm8"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-soup-2.4","binary_version":"2.62.1-1ubuntu0.4+esm8"},{"binary_name":"libsoup-gnome2.4-1","binary_version":"2.62.1-1ubuntu0.4+esm8"},{"binary_name":"libsoup2.4-1","binary_version":"2.62.1-1ubuntu0.4+esm8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}},{"package":{"name":"libsoup2.4","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/libsoup2.4?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.68.2-0ubuntu1","2.68.2-1","2.68.2-2","2.68.2-2build2","2.69.90-1","2.70.0-1","2.70.0-1ubuntu0.1","2.70.0-1ubuntu0.2","2.70.0-1ubuntu0.3","2.70.0-1ubuntu0.4","2.70.0-1ubuntu0.5","2.70.0-1ubuntu0.5+esm1","2.70.0-1ubuntu0.5+esm2","2.70.0-1ubuntu0.5+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"2.70.0-1ubuntu0.5+esm3","binary_name":"gir1.2-soup-2.4"},{"binary_name":"libsoup-gnome2.4-1","binary_version":"2.70.0-1ubuntu0.5+esm3"},{"binary_name":"libsoup2.4-1","binary_version":"2.70.0-1ubuntu0.5+esm3"},{"binary_version":"2.70.0-1ubuntu0.5+esm3","binary_name":"libsoup2.4-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}},{"package":{"name":"libsoup2.4","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libsoup2.4?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.72.0-3ubuntu3","2.74.1-1","2.74.2-2","2.74.2-3","2.74.2-3ubuntu0.1","2.74.2-3ubuntu0.2","2.74.2-3ubuntu0.3","2.74.2-3ubuntu0.4","2.74.2-3ubuntu0.5","2.74.2-3ubuntu0.6","2.74.2-3ubuntu0.7","2.74.2-3ubuntu0.8"],"ecosystem_specific":{"binaries":[{"binary_version":"2.74.2-3ubuntu0.8","binary_name":"gir1.2-soup-2.4"},{"binary_version":"2.74.2-3ubuntu0.8","binary_name":"libsoup-gnome2.4-1"},{"binary_name":"libsoup2.4-1","binary_version":"2.74.2-3ubuntu0.8"},{"binary_version":"2.74.2-3ubuntu0.8","binary_name":"libsoup2.4-common"},{"binary_name":"libsoup2.4-tests","binary_version":"2.74.2-3ubuntu0.8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}},{"package":{"name":"libsoup3","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/libsoup3?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.4-2","3.0.4-3","3.0.5-1","3.0.7-0ubuntu1","3.0.7-0ubuntu1+esm1","3.0.7-0ubuntu1+esm2","3.0.7-0ubuntu1+esm3","3.0.7-0ubuntu1+esm4","3.0.7-0ubuntu1+esm5","3.0.7-0ubuntu1+esm6","3.0.7-0ubuntu1+esm7","3.0.7-0ubuntu1+esm8"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-soup-3.0","binary_version":"3.0.7-0ubuntu1+esm8"},{"binary_name":"libsoup-3.0-0","binary_version":"3.0.7-0ubuntu1+esm8"},{"binary_name":"libsoup-3.0-common","binary_version":"3.0.7-0ubuntu1+esm8"},{"binary_version":"3.0.7-0ubuntu1+esm8","binary_name":"libsoup-3.0-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}},{"package":{"name":"libsoup2.4","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libsoup2.4?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.74.3-1","2.74.3-2","2.74.3-3","2.74.3-6","2.74.3-6build1","2.74.3-6ubuntu1","2.74.3-6ubuntu1.1","2.74.3-6ubuntu1.2","2.74.3-6ubuntu1.3","2.74.3-6ubuntu1.4","2.74.3-6ubuntu1.5","2.74.3-6ubuntu1.6","2.74.3-6ubuntu1.7","2.74.3-6ubuntu1.8"],"ecosystem_specific":{"binaries":[{"binary_version":"2.74.3-6ubuntu1.8","binary_name":"gir1.2-soup-2.4"},{"binary_version":"2.74.3-6ubuntu1.8","binary_name":"libsoup-2.4-1"},{"binary_name":"libsoup-gnome-2.4-1","binary_version":"2.74.3-6ubuntu1.8"},{"binary_name":"libsoup2.4-common","binary_version":"2.74.3-6ubuntu1.8"},{"binary_version":"2.74.3-6ubuntu1.8","binary_name":"libsoup2.4-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}},{"package":{"name":"libsoup3","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libsoup3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.2-4","3.4.4-1","3.4.4-2","3.4.4-4","3.4.4-5","3.4.4-5build1","3.4.4-5build2","3.4.4-5ubuntu0.1","3.4.4-5ubuntu0.2","3.4.4-5ubuntu0.3","3.4.4-5ubuntu0.4","3.4.4-5ubuntu0.5","3.4.4-5ubuntu0.6","3.4.4-5ubuntu0.7","3.4.4-5ubuntu0.8"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-soup-3.0","binary_version":"3.4.4-5ubuntu0.8"},{"binary_name":"libsoup-3.0-0","binary_version":"3.4.4-5ubuntu0.8"},{"binary_name":"libsoup-3.0-common","binary_version":"3.4.4-5ubuntu0.8"},{"binary_name":"libsoup-3.0-tests","binary_version":"3.4.4-5ubuntu0.8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}},{"package":{"name":"libsoup2.4","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libsoup2.4?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.74.3-10","2.74.3-10.1","2.74.3-10.1ubuntu1","2.74.3-10.1ubuntu2","2.74.3-10.1ubuntu3","2.74.3-10.1ubuntu4","2.74.3-10.1ubuntu4.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.74.3-10.1ubuntu4.1","binary_name":"gir1.2-soup-2.4"},{"binary_name":"libsoup-2.4-1","binary_version":"2.74.3-10.1ubuntu4.1"},{"binary_version":"2.74.3-10.1ubuntu4.1","binary_name":"libsoup-gnome-2.4-1"},{"binary_version":"2.74.3-10.1ubuntu4.1","binary_name":"libsoup2.4-common"},{"binary_version":"2.74.3-10.1ubuntu4.1","binary_name":"libsoup2.4-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}},{"package":{"name":"libsoup3","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libsoup3?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.5-1","3.6.5-1ubuntu1","3.6.5-3","3.6.5-4","3.6.5-4ubuntu0.1","3.6.5-4ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-soup-3.0","binary_version":"3.6.5-4ubuntu0.2"},{"binary_version":"3.6.5-4ubuntu0.2","binary_name":"libsoup-3.0-0"},{"binary_name":"libsoup-3.0-common","binary_version":"3.6.5-4ubuntu0.2"},{"binary_name":"libsoup-3.0-tests","binary_version":"3.6.5-4ubuntu0.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}},{"package":{"name":"libsoup3","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libsoup3?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.5-4","3.6.5-5","3.6.5-6","3.6.5-7","3.6.5-9","3.6.6-1"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-soup-3.0","binary_version":"3.6.6-1"},{"binary_name":"libsoup-3.0-0","binary_version":"3.6.6-1"},{"binary_version":"3.6.6-1","binary_name":"libsoup-3.0-common"},{"binary_name":"libsoup-3.0-tests","binary_version":"3.6.6-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}},{"package":{"name":"libsoup2.4","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/libsoup2.4?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.74.3-10.1ubuntu4","2.74.3-10.1ubuntu5","2.74.3-10.1ubuntu5+esm1","2.74.3-10.1ubuntu5+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-soup-2.4","binary_version":"2.74.3-10.1ubuntu5+esm2"},{"binary_version":"2.74.3-10.1ubuntu5+esm2","binary_name":"libsoup-2.4-1"},{"binary_version":"2.74.3-10.1ubuntu5+esm2","binary_name":"libsoup-gnome-2.4-1"},{"binary_version":"2.74.3-10.1ubuntu5+esm2","binary_name":"libsoup2.4-common"},{"binary_version":"2.74.3-10.1ubuntu5+esm2","binary_name":"libsoup2.4-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-4035.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}