CVE-2026-49982
- Source
- https://cve.org/CVERecord?id=CVE-2026-49982
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49982.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-49982
- Aliases
- Downstream
- Related
- Published
- 2026-06-11T15:45:00.685Z
- Modified
- 2026-07-08T08:09:43.199657542Z
- Severity
-
- 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L CVSS Calculator
- Summary
- tmp: Type-confusion bypass of _assertPath in tmp@0.2.6 allows path traversal via non-string prefix/postfix/template
- Details
-
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.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49982.json", "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-20", "CWE-22" ] }- References