CVE-2026-28367
CRITICAL EPSS 48.7%
Published Mar 27, 20263mo ago · Modified Jun 17, 20261w ago
9.1 CVSS 3.1
Published Mar 27, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago
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 Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability None
Threat Intelligence
EPSS Exploit Probability
48.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-444
Affected Products 10
| Vendor | Product | Version | Range |
|---|---|---|---|
| redhat | build_of_apache_camel_-_hawtio | 4.0 | any |
| redhat | build_of_apache_camel_for_spring_boot | 4.0 | any |
| redhat | data_grid | 8.0 | any |
| redhat | fuse | 7.0.0 | any |
| redhat | jboss_enterprise_application_platform | 7.0.0 | any |
| redhat | jboss_enterprise_application_platform | 8.0.0 | any |
| redhat | jboss_enterprise_application_platform_expansion_pack | * | any |
| redhat | process_automation | 7.0 | any |
| redhat | single_sign-on | 7.0 | any |
| redhat | undertow | * | any |
References 4
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:25125
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:25126
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-28367
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2443260
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.