CVE-2026-6338 (GCVE-0-2026-6338)
Vulnerability from cvelistv5 – Published: 2026-06-11 13:47 – Updated: 2026-06-11 14:23
VLAI
EPSS
VEX
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
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
References
1 reference
| URL | Tags |
|---|---|
| https://support.konghq.com/support/s/article/CVE-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| 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) |
guessed |
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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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.
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.
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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.
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