Vulnerability in Novik Rutorrent
CVE-2026-121546
ruTorrent before 5.3.20 contains a path traversal vulnerability in the datadir plugin that allows authenticated users to escape the topDirectory jail because correctDirectory() does not resolve symbolic links. Attackers can submit a datadir path through a symlink under their top directory to create directories and move torrent data to locations writable by the web server or rtorrent.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/Novik/ruTorrent/issues/3474 (issue-tracking)
- github.com/Novik/ruTorrent (product)
- github.com/Novik/ruTorrent/commit/2059ff12464b2ce14fd0f53df8d6b19fb6b8a5eb (patch)
- github.com/Novik/ruTorrent/blob/v5.3.19/plugins/datadir/action.php (technical-description)
- github.com/Novik/ruTorrent/blob/v5.3.19/php/settings.php (technical-description)
- www.vulncheck.com/advisories/rutorrent-before-5.3.20-path-traversal-via-datadir… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121546?
- CVE-2026-121546 is a medium-severity vulnerability in Novik Rutorrent, classified under Improper Link Resolution Before File Access. CVSS score: 5.9/10. Published 2026-11-03.
- How severe is CVE-2026-121546?
- Medium severity. CVSS v3 base score is 5.9 out of 10.