CVE-2026-115895
RCE in happy-dom via crafted ESM import alias allowing Node.js host execution
Is CVE-2026-115895 being exploited?
Not confirmed. CVE-2026-115895 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-115895?
CVE-2026-115895 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-115895?
Yes. A fix has been recorded for CVE-2026-115895. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-115895 affect?
CVE-2026-115895 affects happy-dom >=17.0.0 and <21.0.4, Node.js applications using happy-dom with enableJavaScriptEvaluation. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-115895?
Upgrade to happy-dom v21.0.4 and audit enableJavaScriptEvaluation usage
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution in Node.js when happy-dom (with enableJavaScriptEvaluation) processes attacker-controlled module/HTML.
Patch when possible
- affected>= 17.0.0 and < 21.0.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.