CVE-2026-45225 Details
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.
A path traversal vulnerability has been identified in Heym versions prior to 0.0.21. This vulnerability allows authenticated users to upload files to arbitrary locations by exploiting the file upload endpoint. Attackers can manipulate the filename parameter with traversal sequences to bypass path restrictions, potentially leading to unauthorized file access or modification outside the designated storage directory.
Users are advised to update to Heym version 0.0.21 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 12, 2026CISA-ADP
Assessed May 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/heymrun/heym/pull/92 | CISA-ADP | Issue TrackingVendor |
| https://github.com/heymrun/heym/commit/835843e6d2bf7d018cbb8e50f28f0426eaa20c84 | [email protected] | Source CodeVendor |
| https://github.com/heymrun/heym/pull/92 | [email protected] | Issue TrackingVendor |
| https://github.com/heymrun/heym/releases/tag/v0.0.21 | [email protected] | Release NotesVendor |
| https://www.vulncheck.com/advisories/heym-path-traversal-file-upload-via-upload-file | [email protected] | AdvisoryBundleRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Heym | All versions |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 14, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 14, 2026 | CVE Modified | CISA-ADP |
| May 12, 2026 | New CVE Received | [email protected] |