CVE-2026-6338 (GCVE-0-2026-6338)

Vulnerability from cvelistv5 – Published: 2026-06-11 13:47 – Updated: 2026-06-11 14:23
VLAI
Title
HTTP request smuggling in Kong Enteprise Gateway
Summary
A HTTP request smuggling and desynchronization vulnerability affects Kong Gateway Enterprise 3.4, 3.10, 3.11, 3.12, 3.13, and 3.14 series. The vulnerability is caused by a parsing flaw in Kong’s HTTP request processing pipeline when handling untrusted HTTP/1.1 traffic.
Severity
4.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:P/R:A/RE:M
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-444 - Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')
Assigner
References
Impacted products
Vendor Product Version
Kong Kong Enterprise Gateway Affected: 3.4.0.0 , < 3.4.3.27 (kong enteprise gateway 3.4)
Affected: 3.10.0.0 , < 3.10.0.12 (kong enteprise gateway 3.10)
Affected: 3.11.0.0 , < 3.11.0.12 (kong enteprise gateway 3.11)
Affected: 3.12.0.0 , < 3.12.0.7 (kong enteprise gateway 3.12)
Affected: 3.13.0.0 , < 3.13.0.5 (kong enteprise gateway 3.13)
Affected: 3.14.0.0 , < 3.14.0.4 (kong enteprise gateway 3.14)
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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

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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.


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