What’s Vulnerable › Vulnerabilities

CVE-2026-116073: Leon before commit 50df142 Path Traversal via /download model Command

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-25 · updated 2026-10-26
• Weakness: CWE-22

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.

References

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

Get alerted when CVE-2026-116073 or the next vulnerability affects your stack