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Advisory severityMedium5.6Red Hat Linux

Medium [CVE-2026-48930] Silent authority rebinding due to embedded-nul hostnames in TLS handling

This medium-severity Red Hat Linux advisory covers CVE-2026-48930 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-48930 Source published Source updated

VulniPulse record published Record updated

CVE-2026-48930
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

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Summary

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**.

A flaw was found in Node.js. This vulnerability in the TLS (Transport Layer Security) hostname handling allows embedded null characters in hostnames.

This can lead to silent authority rebinding, potentially enabling an attacker to redirect network traffic to an unintended server and disclose sensitive information. 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 attack complexity. Red Hat severity: Moderate — CVSS 5.6 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L).

Weakness: CWE-170. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images.

Red Hat fixing advisory: RHSA-2026:35841, RHSA-2026:35842, RHSA-2026:39868, RHSA-2026:41947, RHSA-2026:35891, RHSA-2026:35892, RHSA-2026:33866, RHSA-2026:34478, RHSA-2026:35272, RHSA-2026:7378, RHSA-2026:9455.

Affected products named by the advisory: Red Hat package: nodejs24; Red Hat package: nodejs22.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Fixed versions
  • nodejs24-1:24.18.0-1.el10_2
  • nodejs22-1:22.23.1-2.el10_2
  • nodejs:24-8100020260630152626.6d880403
  • nodejs:22-8100020260703140402.6d880403
  • nodejs:24-9080020260626074955.rhel9
  • nodejs:22-9080020260626075442.rhel9
  • nodejs26-main-26.4.0-1.3.hum1
  • nodejs24-main-24.18.0-0.2.hum1
  • nodejs22-main-22.23.1-2.hum1
  • nodejs25-main-25.9.0-1.1.hum1
  • nodejs20-main-20.20.2-1.hum1
  • RHSA-2026:35841
  • RHSA-2026:35842
  • RHSA-2026:39868
  • RHSA-2026:41947
  • RHSA-2026:35891
  • RHSA-2026:35892
  • RHSA-2026:33866
  • RHSA-2026:34478
  • RHSA-2026:35272
  • RHSA-2026:7378
  • RHSA-2026:9455

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • 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.

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

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