Is there a public exploit for CVE-2026-28367?

No public exploit for CVE-2026-28367 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-28367?

CVE-2026-28367 scores CVSS 8.7 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.72%.

What does CVE-2026-28367 affect?

CVE-2026-28367 affects Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9, Red Hat JBoss Enterprise Application Platform 8.1.6, Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8.

8.7 High

A flaw was found in Undertow.

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.

Assessment

CVSS: 8.7 (v3.1)
Severity: High
EPSS: 0.72% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 27 March 2026
Last updated: 2 November 2026
Affected: Red Hat · Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 · Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 · Red Hat JBoss Enterprise Application Platform 8.1.6
Assigner: redhat

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

At the source

EUVD (ENISA)

References

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