Nodejs: A inconsistency in Node.js hostname matching can cause a trust-policy bypass in multi-context mTLS setups. (CVE-2026-48928)
Description
An inconsistency in hostname matching in Node.js can cause a trust-policy bypass in multi-context mutual TLS (mTLS) setups. This vulnerability affects specific versions in the Node.js 22, 24, and 26 release lines, as well as certain Ubuntu package versions. A patch is available to address this issue.
CVSS v3.1
Score 5.4medium
Affected software
pkg:bitnami/nodepkg:deb/ubuntu/nodejs?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/nodejs?arch=source&distro=esm-apps/xenialpkg:deb/ubuntu/nodejs?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/nodejs?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/nodejs?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/nodejs?arch=source&distro=noblepkg:deb/ubuntu/nodejs?arch=source&distro=questingpkg:deb/ubuntu/nodejs?arch=source&distro=stonkingpkg:deb/ubuntu/nodejs?arch=source&distro=resoluteRun 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-2026-48928 describes a vulnerability in Node.js where an inconsistency in hostname matching logic leads to a trust-policy bypass in multi-context mTLS configurations. This flaw allows an attacker to circumvent trust policies by exploiting the hostname verification process. The issue affects specific versions of Node.js 22, 24, and 26 release lines, along with certain Ubuntu package versions. The vulnerability has a CVSS 3.1 base score of 5.4, indicating medium severity. A patch is available for the affected versions to correct the hostname matching behavior and prevent trust-policy bypass.
Potential Impact
The vulnerability allows bypassing trust policies in multi-context mTLS setups due to improper hostname matching. This could lead to unauthorized entities being trusted in TLS connections, potentially compromising the integrity of secure communications. However, the impact is limited to scenarios using multi-context mTLS configurations and requires local privileges (PR:L) with no user interaction (UI:N). The confidentiality and integrity impacts are low, with no availability impact.
Mitigation Recommendations
A patch is available for the affected Node.js versions and Ubuntu package versions. Users should apply the official updates to their Node.js installations to remediate this vulnerability. No additional mitigation steps are indicated beyond applying the patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-node-2026-48928
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-48928"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Medium
- State
- PUBLISHED
Threat ID: 6aa005faacd9273b49ab687b
Added to database: 09/08/2026, 12:56:26 UTC
Last enriched: 10/18/2026, 05:33:24 UTC
Last updated: 10/21/2026, 13:20:22 UTC
Views: 68
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