CVE-2026-28367

Description

A flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending rrr 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.

Risk Information

Base Score

8.7

MODERATE

Vector

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

EPSS Score

Exploitation Probability

0.047

Associated Vulnerability

Vulnerability	OS Platform
Multiple Vulnerabilities are affected in Red Hat JBoss Enterprise Application Platform 7 7.0.0	Windows
Multiple Vulnerabilities are affected in Red Hat Data Grid 8 8.0	Windows
Multiple Vulnerabilities are affected in Red Hat JBoss Enterprise Application Platform 7 8.0.0	Windows
Vulnerabilities CVE-2026-28367,CVE-2026-28368,CVE-2026-28369 are affected in Undertow - undertow-parent 2.3.23	Windows
Vulnerabilities CVE-2026-28367,CVE-2026-28368,CVE-2026-28369 are affected in Undertow - undertow-parent for Linux 2.3.23	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234