{"id":"CVE-2026-43898","sourceIdentifier":"security-advisories@github.com","published":"2026-05-28T18:16:32.837","lastModified":"2026-10-14T20:10:00.190","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"SandboxJS is a JavaScript sandboxing library. Prior to 0.9.6, sandbox-defined functions expose Function.caller, allowing sandboxed code to recover the internal LispType.Call runtime callback. That callback can then be invoked with attacker-controlled fake context and obj values to extract blocked host statics, recover the real host Function constructor, and execute arbitrary host JavaScript. This vulnerability is fixed in 0.9.6."},{"lang":"es","value":"SandboxJS es una biblioteca de sandboxing de JavaScript. Antes de 0.9.6, las funciones definidas en el sandbox exponen Function.caller, permitiendo que el código en el sandbox recupere la devolución de llamada interna de tiempo de ejecución LispType.Call. Esa devolución de llamada puede entonces ser invocada con valores de contexto y obj falsos controlados por el atacante para extraer estáticos de host bloqueados, recuperar el constructor de función de host real y ejecutar JavaScript de host arbitrario. Esta vulnerabilidad está corregida en 0.9.6."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"nyariv","product":"SandboxJS","versions":[{"version":"< 0.9.6","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":10.0,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":6.0}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-28T19:31:59.779037Z","id":"CVE-2026-43898","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-94"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:*","versionEndExcluding":"0.9.6","matchCriteriaId":"E5E55743-0929-4200-9EB6-0CF6FA62CB39"}]}]}],"references":[{"url":"https://github.com/nyariv/SandboxJS/commit/826865251232611ec94078bab5a18ec875dad4a5","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/nyariv/SandboxJS/security/advisories/GHSA-g8f2-4f4f-5jqw","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]},{"url":"https://github.com/nyariv/SandboxJS/security/advisories/GHSA-g8f2-4f4f-5jqw","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Vendor Advisory"]}]}