CVE-2026-28367
Last modified
CVE-2026-28367 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. A flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending `\r\r\r` as a header block terminator. EPSS estimates a 0.71% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Build Of Apache Camel - Hawtio | 4.0 |
| Redhat | Build Of Apache Camel For Spring Boot | 4.0 |
| Redhat | Data Grid | 8.0 |
| Redhat | Fuse | 7.0.0 |
| Redhat | Jboss Enterprise Application Platform | 7.0.0 |
| Redhat | Jboss Enterprise Application Platform | 8.0.0 |
| Redhat | Jboss Enterprise Application Platform Expansion Pack | All versions |
| Redhat | Process Automation | 7.0 |
| Redhat | Single Sign-On | 7.0 |
| Redhat | Undertow | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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