{"id":"CVE-2026-49406","sourceIdentifier":"security-advisories@github.com","published":"2026-06-23T18:18:03.310","lastModified":"2026-10-25T23:10:00.167","vulnStatus":"Analyzed","cveTags":[],"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 ejecución de JavaScript, TypeScript y WebAssembly. Antes de la versión 2.7.12, cuando Deno se ejecutaba en modo BYONM (nodeModulesDir: ’manual’), el resolvedor de módulos 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 contenía segmentos .. podía resolverse a una ruta arbitraria en el disco, y el resolvedor luego leía ese archivo sin consultar la lista de permitidos --allow-read. Esto permitía que una llamada require(’evil-pkg’) devolviera el contenido de un archivo que una llamada directa Deno.readTextFileSync(...) habría sido bloqueada para su lectura. Esta vulnerabilidad está corregida en la versión 2.7.12."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"denoland","product":"deno","versions":[{"version":"< 2.7.12","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":1.8,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-23T17:49:51.311695Z","id":"CVE-2026-49406","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Primary","description":[{"lang":"en","value":"CWE-22"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*","versionEndExcluding":"2.7.12","matchCriteriaId":"09242B23-E899-46B6-8E30-1BAFE453EA69"}]}]}],"references":[{"url":"https://github.com/denoland/deno/security/advisories/GHSA-968w-xfqw-vp9q","source":"security-advisories@github.com","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://github.com/denoland/deno/security/advisories/GHSA-968w-xfqw-vp9q","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Mitigation","Vendor Advisory"]}]}