SEPTEMBER 20, 2026
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Case File

CVE-2026-6390

MEDIUM · CVSS 6.8 EPSS 0.11%

Source: NVD + CISA KEV + EPSS · Published 2026-07-23 · Last synced 2026-08-22

CyberRota Analysis

AI-Generated

GNU nano is vulnerable due to a flaw in its multi-buffer error message handling, which can be exploited when multiple files are opened at startup and one triggers an ALERT-level error. An attacker can craft a filename with printf format specifiers, leading to potential stack information disclosure, denial of service, or arbitrary memory writes. Organizations using GNU nano, particularly those handling sensitive data or in regulated environments, should prioritize addressing this vulnerability to mitigate associated risks.

CVE
CVE-2026-6390
Severity
MEDIUM
CVSS
6.8
EPSS
0.11%

Original NVD 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.