{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33943","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-24T19:50:52.104Z","datePublished":"2026-03-27T21:15:19.186Z","dateUpdated":"2026-03-27T21:58:16.284Z"},"containers":{"cna":{"title":"Happy DOM ECMAScriptModuleCompiler: unsanitized export names are interpolated as executable code","problemTypes":[{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/capricorn86/happy-dom/security/advisories/GHSA-6q6h-j7hj-3r64","tags":["x_refsource_CONFIRM"],"url":"https://github.com/capricorn86/happy-dom/security/advisories/GHSA-6q6h-j7hj-3r64"},{"name":"https://github.com/capricorn86/happy-dom/commit/5437fdf8f13adb9590f9f52616d9f69c3ee8db3c","tags":["x_refsource_MISC"],"url":"https://github.com/capricorn86/happy-dom/commit/5437fdf8f13adb9590f9f52616d9f69c3ee8db3c"},{"name":"https://github.com/capricorn86/happy-dom/releases/tag/v20.8.8","tags":["x_refsource_MISC"],"url":"https://github.com/capricorn86/happy-dom/releases/tag/v20.8.8"}],"affected":[{"vendor":"capricorn86","product":"happy-dom","versions":[{"version":">= 15.10.0, < 20.8.8","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-27T21:15:19.186Z"},"descriptions":[{"lang":"en","value":"Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. In versions 15.10.0 through 20.8.7, a code injection vulnerability in `ECMAScriptModuleCompiler` allows an attacker to achieve Remote Code Execution (RCE) by injecting arbitrary JavaScript expressions inside `export { }` declarations in ES module scripts processed by happy-dom. The compiler directly interpolates unsanitized content into generated code as an executable expression, and the quote filter does not strip backticks, allowing template literal-based payloads to bypass sanitization. Version 20.8.8 fixes the issue."}],"source":{"advisory":"GHSA-6q6h-j7hj-3r64","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/capricorn86/happy-dom/security/advisories/GHSA-6q6h-j7hj-3r64","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-27T21:58:00.418466Z","id":"CVE-2026-33943","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-27T21:58:16.284Z"}}]}}