{"cve":"CVE-2026-50158","nvd":{"published":"2026-09-17T22:16:59.297","modified":"2026-09-24T21:25:27.050","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","score":7.7},"cwes":["CWE-73"],"references":["https://github.com/eat-pray-ai/yutu/commit/87026c4eee1ed28775383807087343a750707bf3","https://github.com/eat-pray-ai/yutu/releases/tag/v0.10.9","https://github.com/eat-pray-ai/yutu/security/advisories/GHSA-2c7f-fxww-6w6c"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-50158","score":0.00229,"percentile":0.13722,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2c7f-fxww-6w6c","url":"https://osv.dev/vulnerability/GHSA-2c7f-fxww-6w6c","summary":"yutu: Arbitrary File Write via MCP `caption-download` Tool","modified":"2026-07-21T19:19:17.309149748Z","packages":[{"ecosystem":"Go","name":"github.com/eat-pray-ai/yutu","purl":"pkg:golang/github.com/eat-pray-ai/yutu","ranges":["<0.10.9-dev1"],"fixed":["0.10.9-dev1"]}]},{"id":"GO-2026-5980","url":"https://osv.dev/vulnerability/GO-2026-5980","summary":"yutu: Arbitrary File Write via MCP `caption-download` Tool in github.com/eat-pray-ai/yutu","modified":"2026-07-21T19:15:30.623691749Z","packages":[{"ecosystem":"Go","name":"github.com/eat-pray-ai/yutu","purl":"pkg:golang/github.com/eat-pray-ai/yutu","ranges":["<0.10.9-dev1"],"fixed":["0.10.9-dev1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}