{"id":"CVE-2026-6390","title":"A flaw was found in GNU nano's multi-buffer error message handling","summary":"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.…","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H","cwe":["CWE-134"],"published":"2026-07-23","updated":"2026-08-21","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-6390","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-6390","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458767","label":"secalert@redhat.com"}],"tags":["nvd"],"epss":0.00154,"epssPercentile":0.04943,"ingestedAt":"2026-08-22T13:32:35.600Z","slug":"CVE-2026-6390","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}