Improper Validation of Specified Quantity in Input in undici - CVE-2026-1528

Vulnerability identifier: #VU127579

CSH Severity: Medium

CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-1528

CWE-ID: CWE-1284

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper validation of specified quantity in input in the ByteParser when processing a WebSocket frame with a 64-bit length field. A remote attacker can send an extremely large length value to cause a denial of service.

undici
IBM Cloud Pak System
DataStage on Cloud Pak for Data
Platform Navigator in IBM Cloud Pak for Integration (CP4I)
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Anolis OS
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
nodejs-npm
v8-12.4-devel
nodejs20
nodejs22 (Red Hat package)
nodejs22
nodejs
nodejs-devel
nodejs-full-i18n
nodejs-libs
nodejs-docs
nodejs24 (Red Hat package)

Install security update from vendor's website.

undici - addressed in versions 6.24.0, 7.24.0
IBM Cloud Pak System - update to 2.3.5.1
DataStage on Cloud Pak for Data - update to 5.4
Platform Navigator in IBM Cloud Pak for Integration (CP4I) - addressed in versions 16.1.0.23, 16.1.3.6
nodejs-npm - update to 10.9.8-1.22.23.0.1
v8-12.4-devel - update to 12.4.254.21-1.22.23.0.1
nodejs20 - update to 20.20.2-3.fc43
nodejs22 (Red Hat package) - addressed in versions 22.22.2-1.el10_1, 22.22.2-2.el10_0
nodejs22 - addressed in versions 22.22.2-2.fc43, 22.22.2-3.fc42, 22.22.2-3.fc44
nodejs - update to 22.23.0-1
nodejs-devel - update to 22.23.0-1
nodejs-full-i18n - update to 22.23.0-1
nodejs-libs - update to 22.23.0-1
nodejs-docs - update to 22.23.0-1
nodejs24 (Red Hat package) - update to 24.14.1-2.el10_1

• https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj

• Multiple vulnerabilities in undici
• Fedora 43 update for nodejs20
• Red Hat Enterprise Linux 10 update for nodejs22
• Red Hat Enterprise Linux 8 update for the nodejs:22 module
• Red Hat Enterprise Linux 9 update for the nodejs:22 module
• Red Hat Enterprise Linux 10 update for nodejs22
• Red Hat Enterprise Linux 9 update for the nodejs:24 module
• Red Hat Enterprise Linux 10 update for nodejs24
• Red Hat Enterprise Linux 9 update for the nodejs:22 module
• Fedora 44 update for nodejs22
• Fedora 43 update for nodejs22
• Multiple vulnerabilities in IBM Platform Navigator in IBM Cloud Pak for Integration (CP4I)
• Fedora 42 update for nodejs22
• Multiple vulnerabilities in IBM DataStage on Cloud Pak for Data
• Multiple vulnerabilities in IBM Cloud Pak System Software
• Anolis OS update for nodejs