CVE-2026-116073
Leon before commit 50df142 Path Traversal via /download model Command
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| leon leon-ai |
≥ a3afdef81c8dd085b922f5a4e6b68bb9b9d802e4; < 50df142a89a0859e5b7283d87afdab7b01e712a2 (affected, git)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.9 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/leon-ai/leon/issues/593CNA: VulnCheck · issue-tracking
- https://github.com/leon-ai/leonCNA: VulnCheck · product
- https://github.com/leon-ai/leon/blob/21baf11714f618a9367f25882e59e856d3308037/server/src/built-in-command/commands/download-command/download-command.ts#L21-L28CNA: VulnCheck · technical-description
- https://github.com/leon-ai/leon/pull/594CNA: VulnCheck · patch, issue-tracking
- https://github.com/leon-ai/leon/commit/50df142a89a0859e5b7283d87afdab7b01e712a2CNA: VulnCheck · patch
- https://www.vulncheck.com/advisories/leon-before-commit-50df142-path-traversal-via-download-model-commandCNA: VulnCheck · third-party-advisory
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