{"cve":"CVE-2026-43898","nvd":{"published":"2026-05-28T18:16:32.837","modified":"2026-10-14T20:10:00.190","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":10.0},"cwes":["CWE-94"],"references":["https://github.com/nyariv/SandboxJS/commit/826865251232611ec94078bab5a18ec875dad4a5","https://github.com/nyariv/SandboxJS/security/advisories/GHSA-g8f2-4f4f-5jqw","https://github.com/nyariv/SandboxJS/security/advisories/GHSA-g8f2-4f4f-5jqw"],"products":["nyariv:sandboxjs"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-43898","score":0.00472,"percentile":0.40571,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-g8f2-4f4f-5jqw","url":"https://osv.dev/vulnerability/GHSA-g8f2-4f4f-5jqw","summary":"SandboxJS has a sandbox escape via Function.caller leakage of internal call op","modified":"2026-09-10T03:51:05.528606073Z","packages":[{"ecosystem":"npm","name":"@nyariv/sandboxjs","purl":"pkg:npm/%40nyariv/sandboxjs","ranges":["<0.9.6"],"fixed":["0.9.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}