CVE-2026-50158 Details
Description
yutu is an AI-powered toolkit for managing and growing YouTube channels. Prior to 0.10.9, the caption-download MCP tool accepts a caller-controlled file parameter through cmd/caption/download.go and passes it to Caption.Download() in pkg/caption/caption.go, where os.Create() creates or truncates that path without using the pkg.Root confinement boundary backed by YUTU_ROOT. A principal able to invoke caption-download, including a local HTTP client when the MCP server runs with its default authentication-disabled configuration, can write downloaded caption bytes to any path writable by the yutu process outside YUTU_ROOT. This can overwrite application files, configuration, shell startup files, logs, or data and can cause persistent code execution or denial of service depending on the selected writable target. Live caption retrieval also requires usable service credentials and an accessible caption identifier. This issue is fixed in version 0.10.9.
An arbitrary file write vulnerability has been identified in the Yutu application, specifically in versions prior to 0.10.9. The issue arises in the caption-download tool, which accepts a caller-controlled file parameter and passes it to a function that writes to the file system without proper validation or confinement. This flaw allows a principal to overwrite any writable file outside the designated YUTU_ROOT directory, potentially leading to persistent code execution or a denial-of-service condition, depending on the target file. The vulnerability can be exploited by invoking the caption-download tool through the MCP server, which, by default, does not require authentication for local HTTP clients.
Users can upgrade to Yutu version 0.10.9 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 17, 2026CISA-ADP
Assessed Sep 18, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/eat-pray-ai/yutu/commit/87026c4eee1ed28775383807087343a750707bf3 | [email protected] | Source CodeVendor |
| https://github.com/eat-pray-ai/yutu/releases/tag/v0.10.9 | [email protected] | Release NotesVendor |
| https://github.com/eat-pray-ai/yutu/security/advisories/GHSA-2c7f-fxww-6w6c | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-73 | External Control of File Name or Path | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| eat-pray-ai yutu | 0.0.0-dev (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 18, 2026 | CVE Modified | CISA-ADP |
| Sep 17, 2026 | New CVE Received | [email protected] |