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.

CVSS 4.0

6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

CWE

CWE-22

Published

2026-10-25

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

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

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