Nodejs: A flaw in Node.js TLS host verification can cause an attacker to bypass certification validation. (CVE-2026-48934)

CVE-2026-48934 describes a flaw in the TLS host verification process in Node.js that permits an attacker to bypass certificate validation. This vulnerability affects certain versions within the Node.js 18, 20, 22, 24, and 26 release lines, specifically versions >=22.22.3 <22.23.0, >=24.16.0 <24.17.0, >=26.3.0 <26.3.1, and several Ubuntu-specific package versions of 18.x and 20.x. The issue compromises the security guarantees of TLS connections by allowing invalid certificates to be accepted. A patch has been made available for these affected versions.

The vulnerability allows an attacker to bypass TLS certificate validation, which could lead to acceptance of invalid or malicious certificates. This undermines the trust model of TLS connections, potentially exposing applications to man-in-the-middle attacks or other interception risks. However, the CVSS score of 4.3 and medium severity rating indicate limited impact, with no reported exploits in the wild.

A patch is available for all affected versions. Users and administrators should apply the official updates to the specified Node.js versions to remediate this vulnerability. No additional mitigation steps are indicated beyond applying the patch.