Affects all supported Node.js releases; widely used runtime; could enable MITM/impersonation.
CVE-2026-48930
TLS hostname handling flaw in Node.js enables silent authority rebinding via embedded-nul hostnames.
Is CVE-2026-48930 being exploited?
Not confirmed. CVE-2026-48930 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 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-48930?
CVE-2026-48930 is rated Critical. 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-2026-48930?
Yes. A fix has been recorded for CVE-2026-48930. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-48930 affect?
CVE-2026-48930 affects Node.js 22.x, Node.js 24.x, Node.js 26.x. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-48930?
Patch when released; monitor advisories.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker could bypass TLS hostname verification, enabling impersonation or MITM in Node.js apps.
Immediate action required
- affected<= 22.22.3
- affected<= 24.16.0
- affected<= 26.3.0
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.