{"id":"CVE-2026-6539","summary":"Notepad++ 8.9.3 Format String Injection via nativeLang.xml","details":"Notepad++ 8.9.3 contains a format string injection vulnerability in the Find Results panel handler that allows attackers to cause denial of service and information disclosure by crafting a malicious nativeLang.xml language pack file. Attackers can distribute a poisoned language pack through community channels that triggers format string interpretation when a user performs search operations, leading to access violations and potential leakage of stack or register contents.","modified":"2026-08-07T11:31:13.086854620Z","published":"2026-04-30T20:31:54.961Z","database_specific":{"cwe_ids":["CWE-134"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6539.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"8.9.4"}]},{"extracted_events":[{"fixed":"8.9.4"}],"source":"CPE_FIELD"}],"cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6539.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6539"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/notepad-format-string-injection-via-nativelang-xml"},{"type":"FIX","url":"https://notepad-plus-plus.org/news/v894-released/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/notepad-plus-plus/notepad-plus-plus","events":[{"introduced":"8452101a4b349c46b19af7d7010588d3b540294f"},{"last_affected":"8452101a4b349c46b19af7d7010588d3b540294f"}],"database_specific":{"source":"CPE_STRING","cpe":"cpe:2.3:a:notepad-plus-plus:notepad\\+\\+:8.9.3:*:*:*:*:*:*:*","extracted_events":[{"introduced":"8.9.3"},{"last_affected":"8.9.3"}]}}],"versions":["8.9.3","v8.9.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6539.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N"}]}