RCE in Jarun Nnn
CVE-2026-121548
Jarun nnn through 5.3 contains an OS command injection vulnerability in plugins/togglex that allows attackers to execute commands via crafted filenames. Attackers can place files whose names contain a double quote and shell syntax, which xargs -I splices into an sh -c script, running commands as the user invoking togglex.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
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/jarun/nnn/issues/2188 (issue-tracking)
- github.com/jarun/nnn (product)
- github.com/jarun/nnn/commit/04715921aece0257fef7a8558c0783493d98efff (patch)
- github.com/jarun/nnn/blob/v5.3/plugins/togglex (technical-description)
- www.vulncheck.com/advisories/nnn-through-5.3-os-command-injection-via-togglex-p… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121548?
- CVE-2026-121548 is a high-severity vulnerability in Jarun Nnn, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-11-03.
- How severe is CVE-2026-121548?
- High severity. CVSS v3 base score is 7.8 out of 10.