CVE-2026-48930 — node
MEDIUMCVE-2026-48930 is a medium-severity (CVSS 5.6) CWE-284 vulnerability. No vendor fix is recorded yet; mitigation options are listed below.
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-48930.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2026-48930 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Description
A flaw in Node.js TLS hostname handling can cause Embedded-nul hostnames can lead to silent authority rebinding due to c-string truncation in resolver bindings.
This vulnerability affects all supported release lines: Node.js 22, Node.js 24, and Node.js 26.
Affected Products
node.jsnodejsDetection & mitigation playbook
VulnerabilityDetect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
No fixed release is recorded for CVE-2026-48930 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
This Moderate impact flaw in Node.js TLS hostname handling allows for silent authority rebinding. The vulnerability arises from c-string truncation when processing embedded-nul hostnames in resolver bindings, potentially enabling an attacker to redirect TLS connections to a malicious server. Exploitation requires high…
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.Source: Red Hat security advisory for CVE-2026-48930 (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Enterprise Linux 10 | nodejs24-1:24.18.0-1.el10_2 | RHSA-2026:35841 |
| Red Hat Enterprise Linux 10 | nodejs22-1:22.23.1-2.el10_2 | RHSA-2026:35842 |
| Red Hat Enterprise Linux 8 | nodejs:24-8100020260630152626.6d880403 | RHSA-2026:39868 |
| Red Hat Enterprise Linux 8 | nodejs:22-8100020260703140402.6d880403 | RHSA-2026:41947 |
| Red Hat Enterprise Linux 9 | nodejs:24-9080020260626074955.rhel9 | RHSA-2026:35891 |
| Red Hat Enterprise Linux 9 | nodejs:22-9080020260626075442.rhel9 | RHSA-2026:35892 |
| Red Hat Hardened Images | nodejs26-main-11.17.0-1.26.4.0.1.3.hum1 | RHSA-2026:33866 |
| Red Hat Hardened Images | nodejs24-main-11.16.0-1.24.18.0.0.2.hum1 | RHSA-2026:34478 |
Frequently Asked Questions
Is CVE-2026-48930 in your dependencies?
Find it across , including transitive dependencies.