{"id":"CVE-2026-25142","aliases":["GHSA-9p4w-fq8m-2hp7"],"url":"https://o3.security/vulnerability/CVE-2026-25142","summary":"SandboxJS Prototype Pollution -> Sandbox Escape -> RCE","details":"SandboxJS is a JavaScript sandboxing library. Prior to 0.8.27, SanboxJS does not properly restrict __lookupGetter__ which can be used to obtain prototypes, which can be used for escaping the sandbox / remote code execution. This vulnerability is fixed in 0.8.27.","published":"2026-02-02T22:51:40.651Z","modified":"2026-08-12T03:51:48.209366704Z","cvss":{"score":10,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@nyariv/sandboxjs","fixedVersion":"0.8.27"}],"fix":{"url":"https://github.com/nyariv/SandboxJS/commit/75c8009db32e6829b0ad92ca13bf458178442bd3","label":"nyariv/SandboxJS@75c8009"},"references":[{"type":"WEB","url":"https://github.com/nyariv/SandboxJS/blob/f212a38fb5a6d4bc2bc2e2466c0c011ce8d41072/src/executor.ts#L368-L398"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25142.json"},{"type":"ADVISORY","url":"https://github.com/nyariv/SandboxJS/security/advisories/GHSA-9p4w-fq8m-2hp7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25142"},{"type":"FIX","url":"https://github.com/nyariv/SandboxJS/commit/75c8009db32e6829b0ad92ca13bf458178442bd3"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:48.209366704Z"}}