CVE-2026-121549

nnn through 5.3 contains an insecure temporary file vulnerability in the pdfread and nuke plugins that allows local attackers to overwrite files by exploiting predictable paths in /tmp. Attackers can pre-create a symlink at the name-derived or PID-derived path so the victim's plugin truncates and overwrites any file the victim can write.

CVSS v3 4.4 MEDIUM

4.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/jarun/nnn
https://github.com/jarun/nnn/blob/v5.3/plugins/nuke#L280
https://github.com/jarun/nnn/blob/v5.3/plugins/pdfread#L9-L10
https://github.com/jarun/nnn/commit/04715921aece0257fef7a8558c0783493d98efff
https://github.com/jarun/nnn/issues/2188
https://www.vulncheck.com/advisories/nnn-through-5.3-insecure-temporary-file-symlink-overwrite-via-pdfread-and-nuke-plugins

Configurations

No configuration.

History

03 Nov 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-11-03 16:17

Updated : 2026-11-03 16:30

NVD link : CVE-2026-121549

Mitre link : CVE-2026-121549

CVE.ORG link : CVE-2026-121549

JSON object : View

Products Affected

No product.

CWE

CWE-377

Insecure Temporary File

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