GHSA-rfgv-xxqx-mfg5

High

GitHubnot-fixedPATCH AVAILABLENot Available

GHSA-rfgv-xxqx-mfg5

Description

undici vulnerable to Denial of Service via unrequested WebSocket subprotocol

Impact Assessment

This high-severity vulnerability could allow attackers to gain unauthorized access, execute arbitrary code, or compromise data integrity. Prompt remediation is strongly recommended.

CVSS v3.1 Score

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Quick Facts

PublishedOct 8, 2026

Last ModifiedOct 8, 2026

Discovered ByIndependent Security Researcher

Statusnot-fixed

Attack Metrics

CVSS v3.1 Metrics Breakdown

attack Vector

attack Complexity

privileges Required

user Interaction

scope

Unchanged

confidentiality Impact

High

integrity Impact

High

availability Impact

High

Remediation Guide

How to Fix This Vulnerability

Remediation Steps

1Upgrade the package to version 6.28.1 or later
2Review and audit affected systems for potential exploitation
3Implement additional security controls if immediate patching is not possible
4Monitor for suspicious activity related to this vulnerability

Mitigation Strategies

Immediate Patching

High

Apply security patches to version 6.28.1 immediately

Network Segmentation

High

Isolate affected systems from untrusted networks until patching is complete

Monitoring and Detection

Medium

Implement enhanced monitoring for exploitation attempts and unusual behavior

Event History

Vulnerability Timeline

Vulnerability published

2026-10-08T09:54:52Z

published

Patches released: 6.28.1

2026-10-08T09:54:52Z

patched

▪ Common questions

How severe is GHSA-rfgv-xxqx-mfg5?

GHSA-rfgv-xxqx-mfg5 is rated HIGH with a CVSS score of 7.5.

How do I fix GHSA-rfgv-xxqx-mfg5?

Upgrade the affected package to 6.28.1.

Back to All Vulnerabilities

GHSA-rfgv-xxqx-mfg5

High

GitHubnot-fixedPATCH AVAILABLENot Available