Vulnerability-Lookup

GHSA-MJ44-8QQ5-6386

Vulnerability from github – Published: 2026-06-11 15:31 – Updated: 2026-06-11 15:31

Details

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

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  "affected": [],
  "aliases": [
    "CVE-2026-6338"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-444"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-11T14:16:32Z",
    "severity": "MODERATE"
  },
  "details": "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\u2019s HTTP request processing pipeline when handling untrusted HTTP/1.1 traffic.",
  "id": "GHSA-mj44-8qq5-6386",
  "modified": "2026-06-11T15:31:34Z",
  "published": "2026-06-11T15:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6338"
    },
    {
      "type": "WEB",
      "url": "https://support.konghq.com/support/s/article/CVE-2026-6338"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:A/V:X/RE:M/U:X",
      "type": "CVSS_V4"
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}

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

Vulnerability from cvelistv5 – Published: 2026-06-11 13:47 – Updated: 2026-06-11 14:23

Title

HTTP request smuggling in Kong Enteprise Gateway

Summary

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 · CISA-ADP (v2.0.3)

Decision recorded 2026-06-11 14:22 UTC

CWE

CWE-444 - Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')

Assigner

Kong mitre root

References

1 reference

URL	Tags
https://support.konghq.com/support/s/article/CVE-…	vendor-advisory

Impacted products

1 product

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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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.