CVE-2026-42089

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{"affected": [{"affectedData": [{"product": "environment", "vendor": "yeoman", "versions": [{"status": "affected", "version": ">= 2.9.0, < 6.0.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Yeoman Environment provides an API to discover, create, and run generators, and to configure where and how a generator is resolved. Versions 2.9.0 through 6.0.0 install missing local generator packages from caller-supplied package names without user confirmation. In downstream consumers that pass attacker-controlled project configuration into this path, this can result in arbitrary package installation and code execution during CLI bootstrap. The vulnerable method is installLocalGenerators(), which calls repository.install() directly without prompting the user. This issue has been fixed in version 6.0.0."}, {"lang": "es", "value": "Yeoman Environment proporciona una API para descubrir, crear y ejecutar generadores, y para configurar d\u00f3nde y c\u00f3mo se resuelve un generador. Las versiones 2.9.0 a la 6.0.0 instalan paquetes de generadores locales faltantes a partir de nombres de paquetes proporcionados por el llamador sin confirmaci\u00f3n del usuario. En consumidores posteriores que pasan configuraci\u00f3n de proyecto controlada por el atacante a esta ruta, esto puede resultar en la instalaci\u00f3n arbitraria de paquetes y ejecuci\u00f3n de c\u00f3digo durante el arranque de la CLI. El m\u00e9todo vulnerable es installLocalGenerators(), que llama directamente a repository.install() sin solicitar al usuario. Este problema ha sido solucionado en la versi\u00f3n 6.0.0."}], "id": "CVE-2026-42089", "lastModified": "2026-10-25T23:10:00.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42089", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-16T17:23:58.864894Z", "version": "2.0.3"}}]}, "published": "2026-06-16T17:16:40.740", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/yeoman/environment/commit/78d2af7e60294784b8a8b3b3b5099c6874b6a1fa"}, {"source": "security-advisories@github.com", "url": "https://github.com/yeoman/environment/pull/753"}, {"source": "security-advisories@github.com", "url": "https://github.com/yeoman/environment/security/advisories/GHSA-vv9j-gjw2-j8wp"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-829"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "yeoman-environment: Yeoman Environment: Arbitrary code execution via unconfirmed package installation", "id": "2489315", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489315"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-426", "details": ["Yeoman Environment provides an API to discover, create, and run generators, and to configure where and how a generator is resolved. Versions 2.9.0 through 6.0.0 install missing local generator packages from caller-supplied package names without user confirmation. In downstream consumers that pass attacker-controlled project configuration into this path, this can result in arbitrary package installation and code execution during CLI bootstrap. The vulnerable method is installLocalGenerators(), which calls repository.install() directly without prompting the user. This issue has been fixed in version 6.0.0.", "A flaw was found in Yeoman Environment. This vulnerability allows an attacker to install arbitrary packages and execute code during command-line interface (CLI) bootstrap. This occurs because the software installs missing local generator packages from caller-supplied names without user confirmation, particularly when downstream consumers pass attacker-controlled project configurations. The primary impact is arbitrary code execution."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, users should avoid processing project configurations from untrusted sources with Yeoman Environment. Ensure that all project configurations and generator package names are from trusted origins to prevent the installation of arbitrary packages and subsequent code execution."}, "name": "CVE-2026-42089", "public_date": "2026-06-16T16:15:04Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-42089\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-42089\nhttps://github.com/yeoman/environment/commit/78d2af7e60294784b8a8b3b3b5099c6874b6a1fa\nhttps://github.com/yeoman/environment/pull/753\nhttps://github.com/yeoman/environment/security/advisories/GHSA-vv9j-gjw2-j8wp"], "statement": "This is an Important flaw in Yeoman Environment that could lead to arbitrary code execution. The vulnerability arises when downstream consumers process attacker-controlled project configurations, allowing the installation of unconfirmed local generator packages during CLI bootstrap. Exploitation requires user interaction with malicious input, limiting the attack vector to specific development workflows.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.9.0,6.0.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "environment", "source": "cna", "vendor": "yeoman"}, "product": "environment", "vendor": "yeoman"}], "created": "2026-06-17T21:45:02.798550+00:00", "updated": "2026-06-23T21:05:12.478198+00:00", "vendors": ["yeoman", "yeoman$PRODUCT$environment"]}