OS Command Injection Vulnerability in nnn by Jarun
CVE-2026-121548

8.4HIGH

Key Information:

Vendor

Jarun

Status
Nnn
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121548?

The nnn file manager, developed by Jarun, exposes an OS command injection vulnerability within the togglex plugin. This flaw allows attackers to craft filenames that include double quotes and shell syntax, enabling the execution of arbitrary commands. When such a filename is processed, it can be passed to an sh -c script via the xargs command, executing malicious commands as the intended user. Users of nnn should ensure they are using a patched version to mitigate this risk.

Affected Version(s)

nnn 0 <= 5.3

References

https://github.com/jarun/nnn/issues/2188
issue-tracking
https://github.com/jarun/nnn
product
https://github.com/jarun/nnn/commit/04715921aece0257fef7a...
patch

CVSS V4

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.