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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
leon-ai leon unaffected
Version Status Constraints
a3afdef81c8dd085b922f5a4e6b68bb9b9d802e4 affected < 50df142a89a0859e5b7283d87afdab7b01e712a2

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/leon-ai/leon cve-icon cve-icon
https://github.com/leon-ai/leon/blob/21baf11714f618a9367f25882e59e856d3308037/server/src/built-in-command/commands/download-command/download-command.ts#L21-L28 cve-icon cve-icon
https://github.com/leon-ai/leon/commit/50df142a89a0859e5b7283d87afdab7b01e712a2 cve-icon cve-icon
https://github.com/leon-ai/leon/issues/593 cve-icon cve-icon
https://github.com/leon-ai/leon/pull/594 cve-icon cve-icon
https://www.vulncheck.com/advisories/leon-before-commit-50df142-path-traversal-via-download-model-command cve-icon cve-icon
History

Sun, 25 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Leon before commit 50df142 Path Traversal via /download model Command
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 6.9, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-25T11:51:00.624Z

Reserved: 2026-10-25T01:57:13.048Z

Link: CVE-2026-116073

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-25T12:16:29.920

Modified: 2026-10-25T12:16:29.920

Link: CVE-2026-116073

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses