{"id":"CVE-2026-45225","title":"Heym < 0.0.21 Path Traversal File Upload via upload_file()","summary":"Heym before 0.0.21 contains a path traversal vulnerability in the file upload endpoint that allows authenticated users to write attacker-controlled files to arbitrary locations by supplying a crafted filename with traversal sequences. At…","severity":"high","cvss":7.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L","cvssSource":"cna","cwe":["CWE-22"],"vendor":"heymrun","product":"heym","affected":["heym < 0.0.21"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-05-14T20:02:11.938210Z"},"exploitAvailable":true,"published":"2026-05-12","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:03:40.252Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-45225","references":[{"url":"https://github.com/heymrun/heym/releases/tag/v0.0.21","label":"heym 0.0.21 Release Notes"},{"url":"https://github.com/heymrun/heym/pull/92"},{"url":"https://github.com/heymrun/heym/commit/835843e6d2bf7d018cbb8e50f28f0426eaa20c84"},{"url":"https://www.vulncheck.com/advisories/heym-path-traversal-file-upload-via-upload-file"}],"tags":["cve.org","exploit-available"],"epss":0.00355,"epssPercentile":0.29454,"ingestedAt":"2026-11-08T14:51:22.424Z","slug":"CVE-2026-45225","body":"## Overview\n\nHeym before 0.0.21 contains a path traversal vulnerability in the file upload endpoint that allows authenticated users to write attacker-controlled files to arbitrary locations by supplying a crafted filename with traversal sequences. Attackers can exploit the unvalidated filename parameter in the upload_file() handler to bypass path restrictions and write, read, or delete files outside the intended storage directory.\n\n## Affected\n\n- `heym < 0.0.21`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":41.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}