{"id":"DEBIAN-CVE-2026-15603","details":"morgan is an HTTP request logger middleware for Node.js. In versions prior to 1.12.0, the internal helper that escapes log token values did not neutralize the Unicode line separator characters U+0085 (Next Line), U+2028 (Line Separator), and U+2029 (Paragraph Separator). An unauthenticated remote client can place these characters in an attacker-controlled log token, for example a Basic auth username surfaced through the remote-user token, so that Unicode-aware downstream log processing splits a single request log into multiple logical records. This is a log forging issue (CWE-117) and an incomplete-fix follow-up to CVE-2026-5078, which only addressed ASCII control characters. The issue is fixed in morgan 1.12.0, which extends the escaping set to cover these Unicode line separators. Upgrade to morgan 1.12.0 to remediate.","modified":"2026-09-29T13:02:56.172520881Z","published":"2026-08-28T16:17:07.417Z","upstream":["CVE-2026-15603"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-15603"}],"affected":[{"package":{"name":"node-morgan","ecosystem":"Debian:12","purl":"pkg:deb/debian/node-morgan?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.0+~1.9.3-1","1.10.1+~1.9.10-1","1.12.0+~1.9.10-1","1.12.1+~1.9.10-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-15603.json"}},{"package":{"name":"node-morgan","ecosystem":"Debian:13","purl":"pkg:deb/debian/node-morgan?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.0+~1.9.3-1","1.10.1+~1.9.10-1","1.12.0+~1.9.10-1","1.12.1+~1.9.10-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-15603.json"}},{"package":{"name":"node-morgan","ecosystem":"Debian:14","purl":"pkg:deb/debian/node-morgan?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.12.0+~1.9.10-1"}]}],"versions":["1.10.0+~1.9.3-1","1.10.1+~1.9.10-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-15603.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}