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… (CVE-2026-48930)
A critical vulnerability in Node.js TLS hostname handling allows embedded null characters in hostnames to cause silent authority rebinding due to C-string truncation in resolver bindings. This affects multiple supported Node.js release lines including versions 22, 24, and 26. The flaw can lead to incorrect hostname verification during TLS connections. A patch is available for the affected versions.
AI Analysis
Technical Summary
CVE-2026-48930 is a vulnerability in Node.js where TLS hostname handling improperly processes hostnames containing embedded null characters. This causes C-string truncation in resolver bindings, which can silently rebind authority during TLS verification. The issue affects Node.js versions >=22.22.3 <22.23.0, >=24.16.0 <24.17.0, and >=26.3.0 <26.3.1. The vulnerability is rated critical and a patch is available.
Potential Impact
The vulnerability can cause silent authority rebinding during TLS hostname verification, potentially allowing an attacker to bypass hostname checks in TLS connections. This undermines the security guarantees of TLS in affected Node.js versions.
Mitigation Recommendations
A patch is available for the affected Node.js versions. Users should upgrade to versions >=22.23.0, >=24.17.0, or >=26.3.1 to remediate this vulnerability.
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… (CVE-2026-48930)
Description
A critical vulnerability in Node.js TLS hostname handling allows embedded null characters in hostnames to cause silent authority rebinding due to C-string truncation in resolver bindings. This affects multiple supported Node.js release lines including versions 22, 24, and 26. The flaw can lead to incorrect hostname verification during TLS connections. A patch is available for the affected versions.
Affected software
pkg:bitnami/nodeRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-48930 is a vulnerability in Node.js where TLS hostname handling improperly processes hostnames containing embedded null characters. This causes C-string truncation in resolver bindings, which can silently rebind authority during TLS verification. The issue affects Node.js versions >=22.22.3 <22.23.0, >=24.16.0 <24.17.0, and >=26.3.0 <26.3.1. The vulnerability is rated critical and a patch is available.
Potential Impact
The vulnerability can cause silent authority rebinding during TLS hostname verification, potentially allowing an attacker to bypass hostname checks in TLS connections. This undermines the security guarantees of TLS in affected Node.js versions.
Mitigation Recommendations
A patch is available for the affected Node.js versions. Users should upgrade to versions >=22.23.0, >=24.17.0, or >=26.3.1 to remediate this vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-node-2026-48930
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-48930"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Critical
- Cvss Version
- null
Threat ID: 6aa005faacd9273b49ab6879
Added to database: 09/08/2026, 12:56:26 UTC
Last enriched: 09/08/2026, 13:35:23 UTC
Last updated: 09/09/2026, 01:14:01 UTC
Views: 14
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