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    CVE-2026-28367

    A flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending `\r\r\r` as a header block terminator. This can be used for request smuggling with certain proxy servers, such as older versions of Apache Traffic Server and Google Cloud Classic Application Load Balancer, potentially leading to unauthorized access or manipulation of web requests.

    Published:Mar 27, 2026
    Last Modified:Jun 10, 2026
    EPS:Mar 27, 2026
    EPSS Score:0.00049
    CVSS Score:8.7

    Affected Products

    Vendor
    Redhat
    Product
    Apache Camel Hawtio
    Vendor
    Redhat
    Product
    Build Of Apache Camel - Hawtio
    Vendor
    Redhat
    Product
    Build Of Apache Camel For Spring Boot
    Vendor
    Redhat
    Product
    Camel Spring Boot
    Vendor
    Redhat
    Product
    Data Grid
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Fuse
    Vendor
    Redhat
    Product
    Jboss Data Grid
    Vendor
    Redhat
    Product
    Jboss Enterprise Application Platform
    Vendor
    Redhat
    Product
    Jboss Enterprise Application Platform Expansion Pack
    Vendor
    Redhat
    Product
    Jboss Enterprise Bpms Platform
    Vendor
    Redhat
    Product
    Jboss Fuse
    Vendor
    Redhat
    Product
    Jbosseapxp
    Vendor
    Redhat
    Product
    Process Automation
    Vendor
    Redhat
    Product
    Red Hat Single Sign On
    Vendor
    Redhat
    Product
    Single Sign-on
    Vendor
    Redhat
    Product
    Undertow

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-273 HTTP Response Smuggling
    CAPEC-33 HTTP Request Smuggling

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    CVE-2026-14180 (CVSS 5.3) — A flaw was found in the ChunkReader component of the Undertow HTTP server, which is used by WildFly and JBoss …
    CVE-2026-28369 (CVSS 8.7) — A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with o…
    CVE-2026-28368 (CVSS 8.7) — A flaw was found in Undertow. This vulnerability allows a remote attacker to construct specially crafted reque…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High