CVE-2026-6390
MEDIUM
NVD
CVSS Score
6.8
Severity
MEDIUM
Published
Jul 23, 2026
Vendor
unknown
Description
A flaw was found in GNU nano's multi-buffer error message handling. When a user opens multiple files at startup and one triggers an ALERT-level error, a specially crafted filename containing printf format specifiers can be reinterpreted. This format string vulnerability may allow an attacker to achieve stack information disclosure, cause a denial of service (crash), or potentially perform arbitrary memory writes.