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.
- CVSS 3.1
- 9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-25)
- CWE
- CWE-444
- Published
- Modified
- Record from
- the NVD, synced
Affected
- redhat:build_of_apache_camel_-_hawtio
- redhat:build_of_apache_camel_for_spring_boot
- redhat:data_grid
- redhat:fuse
- redhat:jboss_enterprise_application_platform
- redhat:jboss_enterprise_application_platform_expansion_pack
- redhat:process_automation
- redhat:single_sign-on
- redhat:undertow
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-3gv6-g396-9v4r | Maven | io.undertow:undertow-parent | <=2.3.23.Final | no fix published |