{"id":"CVE-2026-49982","revision":"b480f50d603440e79794b294725d3cac","records":[{"revision":"b480f50d603440e79794b294725d3cac","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-49982","aliases":[],"title":"tmp: Type-confusion bypass of _assertPath in tmp@0.2.6 allows path traversal via non-string prefix/postfix/template","description":"tmp is a temporary file and directory creator for node.js. In version 0.2.6, the _assertPath guard added to tmp rejects only string values that contain the substring ... It is bypassed when prefix, postfix, or template is supplied as a non-string value (Array, Buffer, or any object) whose includes('..') returns falsy but whose stringification still contains ../. The value flows through Array.prototype.join/String coercion inside _generateTmpName and path.join(tmpDir, opts.dir, name), producing a final path that escapes tmpdir and creates a file or directory at an attacker-controlled location with the host process's privileges. This affects any application that forwards untrusted request data (a common pattern is JSON body fields or qs-parsed bracket-array query strings such as ?prefix[]=...) into tmp.file, tmp.fileSync, tmp.dir, tmp.dirSync, tmp.tmpName, or tmp.tmpNameSync without explicit type coercion. This vulnerability is fixed in 0.2.7.","state":0,"publishedAt":"2026-06-11T15:45:00.685+00:00","modifiedAt":"2026-06-11T18:24:22.459+00:00","affected":[{"ecosystem":"Vendor product","name":"node-tmp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"raszi\",\n                    \"product\": \"node-tmp\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0.2.6\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","score":8.2,"severity":"HIGH"}],"references":["https://github.com/raszi/node-tmp/security/advisories/GHSA-7c78-jf6q-g5cm"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-49982","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-49982","identifiers":["CVE-2026-49982"]},"retained":false,"historicalAffected":[]}],"coverage":[]}