CVE-2026-50158 (GCVE-0-2026-50158)
Vulnerability from cvelistv5 – Published: 2026-09-17 21:43 – Updated: 2026-09-18 14:43
VLAI
EPSS
VEX
Title
yutu: Arbitrary File Write via MCP `caption-download` Tool
Summary
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.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 14:36 UTC
CWE
- CWE-73 - External Control of File Name or Path
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/eat-pray-ai/yutu/security/advi… | x_refsource_CONFIRM |
| https://github.com/eat-pray-ai/yutu/commit/87026c… | x_refsource_MISC |
| https://github.com/eat-pray-ai/yutu/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| eat-pray-ai | yutu |
Affected:
< 0.10.9-dev1
|
guessed |
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Sightings
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|---|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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