CVE-2026-28369

Summary

A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more spaces, it incorrectly processes the request by stripping these leading spaces. This behavior, which violates HTTP standards, can be exploited by a remote attacker to perform request smuggling. Request smuggling allows an attacker to bypass security mechanisms, access restricted information, or manipulate web caches, potentially leading to unauthorized actions or data exposure.

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')

ADP Enrichment

CISA ADP Vulnrichment

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

References