Request Smuggling Vulnerability in Undertow by Red Hat
CVE-2026-28367

8.7HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Build Of Apache Camel For Spring Boot 4
Red Hat Build Of Apache Camel - Hawtio 4
Red Hat Data Grid 8
Red Hat Enterprise Linux 10
Vendor
CVE Published:
27 March 2026

What is CVE-2026-28367?

A vulnerability exists in Undertow that allows remote attackers to exploit header block terminators, specifically by sending `

`. This technique can lead to request smuggling when used with certain proxy servers, including older versions of Apache Traffic Server and Google Cloud Classic Application Load Balancer. By exploiting this flaw, attackers may gain unauthorized access or manipulate web requests, potentially leading to further security breaches.

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References

https://access.redhat.com/security/cve/CVE-2026-28367
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2443260
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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