{"id":"DEBIAN-CVE-2026-44889","details":"WebOb provides objects for HTTP requests and responses. Prior to 1.8.10, the normalization of the HTTP Location header during a redirect is vulnerable to an open redirect: WebOb joins the redirect target to the request URI using Python's urljoin, and since Python 3.10 the underlying urlsplit strips ASCII tab, carriage return, and newline characters before parsing, so a redirect target containing such characters can be reinterpreted as a protocol-relative URL whose authority is an attacker-controlled host. This bypasses the CVE-2024-42353 fix that escaped a leading double slash, allowing an attacker who influences the redirect location to send users to an arbitrary external site instead of the intended one. This vulnerability is fixed in 1.8.10.","modified":"2026-09-01T16:06:45.060343779Z","published":"2026-06-22T22:16:46.350Z","upstream":["CVE-2026-44889"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-44889"}],"affected":[{"package":{"name":"python-webob","ecosystem":"Debian:12","purl":"pkg:deb/debian/python-webob?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.8.10-1","1:1.8.6-3","1:1.8.7-1","1:1.8.7-2","1:1.8.7-3","1:1.8.9-1","1:1.8.9-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44889.json"}},{"package":{"name":"python-webob","ecosystem":"Debian:13","purl":"pkg:deb/debian/python-webob?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.8.10-0+deb13u1"}]}],"versions":["1:1.8.9-1","1:1.8.9-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44889.json"}},{"package":{"name":"python-webob","ecosystem":"Debian:14","purl":"pkg:deb/debian/python-webob?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.8.10-1"}]}],"versions":["1:1.8.9-1","1:1.8.9-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44889.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}