CVE-2026-45225
HIGH
NVD
CVSS Score
7.6
Severity
HIGH
Published
May 12, 2026
Vendor
unknown
Description
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. 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.