FKIE_CVE-2026-28367

Vulnerability from fkie_nvd - Published: 2026-03-27 17:16 - Updated: 2026-06-17 10:28
Severity
8.7 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
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.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:25125
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:25126
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-28367Vendor Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2443260Issue Tracking, Vendor Advisory
Impacted products
Vendor Product Version
redhat build_of_apache_camel_-_hawtio 4.0
redhat build_of_apache_camel_for_spring_boot 4.0
redhat data_grid 8.0
redhat fuse 7.0.0
redhat jboss_enterprise_application_platform 7.0.0
redhat jboss_enterprise_application_platform 8.0.0
redhat jboss_enterprise_application_platform_expansion_pack -
redhat process_automation 7.0
redhat single_sign-on 7.0
redhat undertow -
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.