{"id":"CVE-2026-43898","title":"SandboxJS is a JavaScript sandboxing library","summary":"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 attack…","severity":"critical","cvss":10,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-94"],"vendor":"nyariv","product":"sandboxjs","affected":["sandboxjs < 0.9.6"],"patched":["sandboxjs 0.9.6"],"published":"2026-05-28","updated":"2026-10-14","sourceUpdated":"2026-10-14T20:10:00.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-43898","references":[{"url":"https://github.com/nyariv/SandboxJS/commit/826865251232611ec94078bab5a18ec875dad4a5","label":"security-advisories@github.com"},{"url":"https://github.com/nyariv/SandboxJS/security/advisories/GHSA-g8f2-4f4f-5jqw","label":"security-advisories@github.com"},{"url":"https://github.com/nyariv/SandboxJS/security/advisories/GHSA-g8f2-4f4f-5jqw","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00632,"epssPercentile":0.49073,"ingestedAt":"2026-10-14T20:53:12.341Z","slug":"CVE-2026-43898","body":"## Overview\n\nSandboxJS 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.\n\n## Affected\n\n- `sandboxjs < 0.9.6`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `sandboxjs 0.9.6`","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":55,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}