CVE-2026-28368

Summary

A flaw was found in Undertow. This vulnerability allows a remote attacker to construct specially crafted requests where header names are parsed differently by Undertow compared to upstream proxies. This discrepancy in header interpretation can be exploited to launch request smuggling attacks, potentially bypassing security controls and accessing unauthorized resources.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 80:2.40.0-7.redhat_00015.1.el8eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 80:801.6.1-1.GA_redhat_00001.1.el8eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 80:2.3.24-3.SP2_redhat_00001.1.el8eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 80:8.1.6-7.GA_redhat_00010.1.el8eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 90:2.40.0-7.redhat_00015.1.el9eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 90:801.6.1-1.GA_redhat_00001.1.el9eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 90:2.3.24-3.SP2_redhat_00001.1.el9eap < *unaffected
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 90:8.1.6-7.GA_redhat_00010.1.el9eap < *unaffected

Weaknesses

  • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References