GHSA-mcfm-h73v-635m

Medium

GitHubnot-fixedPATCH AVAILABLENot Available

GHSA-mcfm-h73v-635m

Description

Undertow-core vulnerable to HTTP Request Smuggling

Impact Assessment

This medium-severity vulnerability could be exploited under certain conditions to compromise security controls or access sensitive information. Should be addressed in a timely manner.

CVSS v3.1 Score

6.5

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Quick Facts

PublishedJul 12, 2026

Last ModifiedJul 12, 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

Medium

integrity Impact

Medium

availability Impact

Medium

Remediation Guide

How to Fix This Vulnerability

Remediation Steps

1Upgrade the package to version 1.3.31 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 1.3.31 immediately

Network Segmentation

Medium

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

2026-07-12T09:43:33Z

published

Patches released: 1.3.31

2026-07-12T09:43:33Z

patched

▪ Common questions

How severe is GHSA-mcfm-h73v-635m?

GHSA-mcfm-h73v-635m is rated MEDIUM with a CVSS score of 6.5.

How do I fix GHSA-mcfm-h73v-635m?

Upgrade the affected package to 1.3.31.

Back to All Vulnerabilities

GHSA-mcfm-h73v-635m

Medium

GitHubnot-fixedPATCH AVAILABLENot Available