Path Traversal in Heymrun Heym
CVE-2026-45225
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. Atta…
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.000 (12.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L.
Affected products
- Heymrun Heym — versions 0, 835843e6d2bf7d018cbb8e50f28f0426eaa20c84
Weakness classification (CWE)
References
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-45225?
- CVE-2026-45225 is a high-severity vulnerability in Heymrun Heym, classified under Path Traversal. CVSS score: 7.6/10. Published 2026-05-12.
- How severe is CVE-2026-45225?
- High severity. CVSS v3 base score is 7.6 out of 10.