CVE-2026-25931

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{"affected": [{"affectedData": [{"product": "vscode-spell-checker", "vendor": "streetsidesoftware", "versions": [{"status": "affected", "version": "< 4.5.4"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "vscode-spell-checker is a basic spell checker that works well with code and documents. Prior to v4.5.4, DocumentSettings._determineIsTrusted treats the configuration value cSpell.trustedWorkspace as the authoritative trust flag. The value defaults to true (package.json) and is read from workspace configuration each time settings are fetched. The code coerces any truthy value to true and forwards it to ConfigLoader.setIsTrusted , which in turn allows JavaScript/TypeScript configuration files ( .cspell.config.js/.mjs/.ts , etc.) to be located and executed. Because no VS Code workspace-trust state is consulted, an untrusted workspace can keep the flag true and place a malicious .cspell.config.js ; opening the workspace causes the extension host to execute attacker-controlled Node.js code with the user\u2019s privileges. This vulnerability is fixed in v4.5.4."}, {"lang": "es", "value": "vscode-spell-checker es un corrector ortogr\u00e1fico b\u00e1sico que funciona bien con c\u00f3digo y documentos. Antes de la v4.5.4, DocumentSettings._determineIsTrusted trata el valor de configuraci\u00f3n cSpell.trustedWorkspace como el indicador de confianza autoritativo. El valor predeterminado es true (package.json) y se lee de la configuraci\u00f3n del espacio de trabajo cada vez que se obtienen los ajustes. El c\u00f3digo fuerza cualquier valor truthy a true y lo reenv\u00eda a ConfigLoader.setIsTrusted, lo que a su vez permite que los archivos de configuraci\u00f3n de JavaScript/TypeScript ( .cspell.config.js/.mjs/.ts , etc.) sean localizados y ejecutados. Debido a que no se consulta ning\u00fan estado de confianza del espacio de trabajo de VS Code, un espacio de trabajo no confiable puede mantener el indicador en true y colocar un .cspell.config.js malicioso; abrir el espacio de trabajo hace que el host de la extensi\u00f3n ejecute c\u00f3digo Node.js controlado por el atacante con los privilegios del usuario. Esta vulnerabilidad se corrige en la v4.5.4."}], "id": "CVE-2026-25931", "lastModified": "2026-06-17T10:25:26.907", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-25931", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-10T16:54:12.365128Z", "version": "2.0.3"}}]}, "published": "2026-02-09T23:16:05.753", "references": [{"source": "security-advisories@github.com", "url": "https://drive.google.com/file/d/1mT4SOkkHSHU6NFfKwekysydAd3FUAC6K/view?usp=sharing"}, {"source": "security-advisories@github.com", "url": "https://github.com/streetsidesoftware/vscode-spell-checker/commit/f39af9a3a6f2a939a57171a24161ed735d41c575"}, {"source": "security-advisories@github.com", "url": "https://github.com/streetsidesoftware/vscode-spell-checker/releases/tag/code-spell-checker-v4.5.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/streetsidesoftware/vscode-spell-checker/security/advisories/GHSA-mggq-68mr-58vj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-276"}, {"lang": "en", "value": "CWE-807"}, {"lang": "en", "value": "CWE-829"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.5.4)"}}], "product": "vscode-spell-checker", "vendor": "streetsidesoftware"}], "analysis": {"en": {"generated_at": "2026-04-17T21:05:25.943813+00:00", "value": {"mitigation_remediation": ["Update vscode\u2011spell\u2011checker to version 4.5.4 or later, the version that removes the trust\u2011bypass flaw.", "If an immediate update is unavailable, configure the extension to disable the trustedWorkspace flag or remove cSpell.trustedWorkspace from the workspace settings, ensuring the extension treats the workspace as untrusted and refuses to load user\u2011supplied .cspell.config.js files.", "As an additional safeguard, restrict Node.js execution by the extension by applying VS Code policies that block arbitrary JavaScript execution or by disabling the extension in untrusted workspaces."], "summary": {"action": "Patch Immediately", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The affected product is the Streetsidesoftware vscode\u2011spell\u2011checker extension for Visual Studio Code. All releases prior to v4.5.4 are vulnerable, including v4.5.0 to v4.5.3 and earlier minor versions. The vulnerability is limited to systems where the extension is installed and a malicious workspace is opened.", "description_and_impact": "A misinterpretation of the workspace trust flag in vscode\u2011spell\u2011checker allows an attacker to place a malicious .cspell.config.js in a workspace that is then loaded automatically when the workspace is opened. The configuration value cSpell.trustedWorkspace is treated as an authoritative trust flag by default, and any truthy value is coerced to true. This bypass lets untrusted workspaces run attacker\u2011controlled JavaScript/TypeScript code with the user\u2019s privileges, providing an arbitrary code execution vector. The underlying weakness stems from improper trust validation and incorrect configuration handling (CWE\u2011276, CWE\u2011807, CWE\u2011829).", "risk_and_exploitability": "The CVSS score is 7.8, indicating high severity. The EPSS score is below 1%, reflecting a low probability of exploitation in the wild. It is not listed in CISA\u2019s KEV catalog, but due to the local nature of the attack, an attacker can trigger the flaw by creating or modifying a workspace. The primary attack vector is a maliciously crafted workspace opened by an ordinary user; no remote network access is required."}}}}, "created": "2026-02-10T11:34:55.237475+00:00", "updated": "2026-04-17T21:15:27.378161+00:00", "vendors": ["streetsidesoftware", "streetsidesoftware$PRODUCT$vscode-spell-checker"]}