Upstream information

CVE-2026-1526 at MITRE

Description

The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSocket connection negotiates the permessage-deflate extension, the client decompresses incoming compressed frames without enforcing any limit on the decompressed data size. A malicious WebSocket server can send a small compressed frame (a "decompression bomb") that expands to an extremely large size in memory, causing the Node.js process to exhaust available memory and crash or become unresponsive.

The vulnerability exists in the PerMessageDeflate.decompress() method, which accumulates all decompressed chunks in memory and concatenates them into a single Buffer without checking whether the total size exceeds a safe threshold.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (openjs)
Base Score 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3.1
No SUSE Bugzilla entries cross referenced.

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Liberty Linux 8
  • nodejs >= 22.22.2-1.module+el8.10.0+24148+847b6786
  • nodejs-devel >= 22.22.2-1.module+el8.10.0+24148+847b6786
  • nodejs-docs >= 22.22.2-1.module+el8.10.0+24148+847b6786
  • nodejs-full-i18n >= 22.22.2-1.module+el8.10.0+24148+847b6786
  • nodejs-libs >= 22.22.2-1.module+el8.10.0+24148+847b6786
  • nodejs-nodemon >= 3.0.1-1.module+el8.10.0+24148+847b6786
  • nodejs-packaging >= 2021.06-6.module+el8.10.0+24148+847b6786
  • nodejs-packaging-bundler >= 2021.06-6.module+el8.10.0+24148+847b6786
  • npm >= 10.9.7-1.22.22.2.1.module+el8.10.0+24148+847b6786
  • v8-12.4-devel >= 12.4.254.21-1.22.22.2.1.module+el8.10.0+24148+847b6786
 Patchnames:
RHSA-2026:7123

SUSE Timeline for this CVE

CVE page created: Fri Mar 13 00:03:30 2026
CVE page last modified: Thu Apr 9 20:44:37 2026