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Vulnerability record · CVE-2026-28367 · published 27 March 2026

CVE-2026-28367: Redhat build of apache camel - hawtio http request smuggling vulnerability

Redhat · Build Of Apache Camel Hawtio

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.

9.1 CVSS 3.1 Critical EPSS 0.89% · top 42.3% CWE-444 · HTTP request smuggling
9.1CVSS 3.1 base score
0.89%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
4References
21 Sep 2026Last modified by NVD

Description

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.

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

Affected products

9 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:25125
https://access.redhat.com/errata/RHSA-2026:25126
https://access.redhat.com/security/cve/CVE-2026-28367 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2443260 Issue TrackingVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-28367), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.