Path Traversal in Leon-Ai Leon
CVE-2026-116073
Leon before commit 50df142 contains a path traversal vulnerability in getModelFileNameFromURL() that allows attackers to write files outside the models directory via percent-encoded separators. Attackers can trick a user into running '/download model' with a crafted URL containing encoded '../' sequences to write attacker-controlled content to arbitrary paths writable by Leon.
Vulnerability class: Path Traversal (Directory Traversal)
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/leon-ai/leon/issues/593 (issue-tracking)
- github.com/leon-ai/leon (product)
- github.com/leon-ai/leon/blob/21baf11714f618a9367f25882e59e856d3308037/server/sr… (technical-description)
- github.com/leon-ai/leon/pull/594 (issue-tracking, patch)
- github.com/leon-ai/leon/commit/50df142a89a0859e5b7283d87afdab7b01e712a2 (patch)
- www.vulncheck.com/advisories/leon-before-commit-50df142-path-traversal-via-down… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116073?
- CVE-2026-116073 is a medium-severity vulnerability in Leon-Ai Leon, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-10-25.
- How severe is CVE-2026-116073?
- Medium severity. CVSS v3 base score is 6.5 out of 10.