CVE-2026-49406

{"id": "CVE-2026-49406", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49406", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-23T17:49:51.311695Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "denoland", "product": "deno", "versions": [{"status": "affected", "version": "< 2.7.12"}]}]}], "published": "2026-06-23T18:18:03.310", "references": [{"url": "https://github.com/denoland/deno/security/advisories/GHSA-968w-xfqw-vp9q", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/denoland/deno/security/advisories/GHSA-968w-xfqw-vp9q", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-22"}]}], "descriptions": [{"lang": "en", "value": "Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.12, when Deno was run in BYONM mode (nodeModulesDir: \"manual\"), the module resolver did not validate that a package's resolved entrypoint stayed within its node_modules/<pkg>/ directory. A malicious package.json whose main field contained .. segments was able to resolve to an arbitrary path on disk, and the resolver then read that file without consulting the --allow-read allowlist. This let a require(\"evil-pkg\") call return the contents of a file that a direct Deno.readTextFileSync(...) call would have been blocked from reading. This vulnerability is fixed in 2.7.12."}, {"lang": "es", "value": "Deno es un entorno de ejecuci\u00f3n de JavaScript, TypeScript y WebAssembly. Antes de la versi\u00f3n 2.7.12, cuando Deno se ejecutaba en modo BYONM (nodeModulesDir: \u2019manual\u2019), el resolvedor de m\u00f3dulos no validaba que el punto de entrada resuelto de un paquete permaneciera dentro de su directorio node_modules/[pkg]/. Un package.json malicioso cuyo campo main conten\u00eda segmentos .. pod\u00eda resolverse a una ruta arbitraria en el disco, y el resolvedor luego le\u00eda ese archivo sin consultar la lista de permitidos --allow-read. Esto permit\u00eda que una llamada require(\u2019evil-pkg\u2019) devolviera el contenido de un archivo que una llamada directa Deno.readTextFileSync(...) habr\u00eda sido bloqueada para su lectura. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 2.7.12."}], "lastModified": "2026-10-25T23:10:00.167", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "09242B23-E899-46B6-8E30-1BAFE453EA69", "versionEndExcluding": "2.7.12"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}