{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-121549","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-03T14:46:14.234Z","datePublished":"2026-11-03T15:17:08.749Z","dateUpdated":"2026-11-03T15:17:08.749Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-03T15:17:08.749Z"},"datePublic":"2026-10-31T00:00:00.000Z","title":"nnn through 5.3 Insecure Temporary File Symlink Overwrite via pdfread and nuke Plugins","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Insecure Temporary File","cweId":"CWE-377","type":"CWE"}]}],"affected":[{"vendor":"jarun","product":"nnn","defaultStatus":"unaffected","versions":[{"version":"0","lessThanOrEqual":"5.3","versionType":"custom","status":"affected"}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":4.1,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":4.4,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/jarun/nnn/issues/2188","tags":["issue-tracking"],"name":"GitHub Issue #2188"},{"url":"https://github.com/jarun/nnn","tags":["product"]},{"url":"https://github.com/jarun/nnn/commit/04715921aece0257fef7a8558c0783493d98efff","tags":["patch"],"name":"Fix commit"},{"url":"https://github.com/jarun/nnn/blob/v5.3/plugins/pdfread#L9-L10","tags":["technical-description"]},{"url":"https://github.com/jarun/nnn/blob/v5.3/plugins/nuke#L280","tags":["technical-description"]},{"name":"VulnCheck Advisory: nnn through 5.3 Insecure Temporary File Symlink Overwrite via pdfread and nuke Plugins","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/nnn-through-5.3-insecure-temporary-file-symlink-overwrite-via-pdfread-and-nuke-plugins"}],"credits":[{"lang":"en","value":"George Chen","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}