8.7
High
CVE-2026-28367 Undertow: undertow: request smuggling via `\r\r\r` as a header block terminator
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 detail
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:NExploitable remotely over the network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- Interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat build of Apache Camel for Spring Boot 4 | Versions not published | |
| Red Hat build of Apache Camel - HawtIO 4 | Versions not published | |
| Red Hat Data Grid 8 | Versions not published | |
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Fuse 7 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 7 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8 | Versions not published |
Show the 8 other branches Hide the 8 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Versions not published | |
| Red Hat Process Automation 7 | Versions not published | |
| Red Hat Single Sign-On 7 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1.7.GA 2.3 | earliest → < 2.3.24.SP3-redhat-00001 | 2.3.24.SP3-redhat-00001 |
| Red Hat JBoss Enterprise Application Platform 8.1.6 2.3 | earliest → < 2.3.24.SP2-redhat-00001 | 2.3.24.SP2-redhat-00001 |
References
- RHSA-2026:25125 access.redhat.com
- RHSA-2026:25126 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2443260 bugzilla.redhat.com
Timeline
- Published
- Last modified
Other CVEs of Red Hat build of Apache Camel for Spring Boot 4
The 106 CVEs of Red Hat build of Apache Camel for Spring Boot 4 →
CVE-2026-91920
Undertow: undertow: chunkreader message length permits chunk-size overflow
6.5
Medium
CVE-2026-114370
A flaw was found in the PathResourceManager component of the Undertow web server
3.7
Low
CVE-2026-93562
A flaw was found in Netty's HTTP/1 decoder
6.5
Medium
CVE-2026-93574
A flaw was found in Netty's `netty-codec-http` component
6.5
Medium