{"id":"DEBIAN-CVE-2026-121550","details":"nnn through 5.3 contains an insecure file handling vulnerability that allows local attackers to redirect writes because main() accepts an existing NNN_FIFO path without verifying it is a FIFO. Attackers can pre-create the documented predictable /tmp/nnn.fifo path as a symlink or readable regular file, causing victim-writable files to be overwritten or leaking the victim's browsed paths.","modified":"2026-11-06T19:00:06.347619489Z","published":"2026-11-03T16:17:26.897Z","upstream":["CVE-2026-121550"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-121550"}],"affected":[{"package":{"name":"nnn","ecosystem":"Debian:12","purl":"pkg:deb/debian/nnn?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.7-1","4.8-1","4.9-1","5.0-1","5.1-1","5.2-1","5.3-1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121550.json"}},{"package":{"name":"nnn","ecosystem":"Debian:13","purl":"pkg:deb/debian/nnn?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0-1","5.1-1","5.2-1","5.3-1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121550.json"}},{"package":{"name":"nnn","ecosystem":"Debian:14","purl":"pkg:deb/debian/nnn?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0-1","5.1-1","5.2-1","5.3-1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121550.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N"}]}