Kong API Gateway Enterprise: SAML Authentication bypass

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-14917
StatePUBLISHED
AssignerKong
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 10:16:48 UTC
Updated2026-09-18 19:07:38 UTC
DescriptionA SAML authentication bypass vulnerability affects the Kong SAML plugin when the validate_assertion_signature option is explicitly set to false. This option is enabled by default. When disabled, the plugin may extract the SAML identity from an unsigned assertion and authenticate the user without verifying a valid cryptographic signature. As a result, an unauthenticated remote attacker may be able to submit a crafted SAML response and impersonate arbitrary users, including administrators

Risk And Classification

Primary CVSS: v4.0 7.7 HIGH from 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/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:X/V:X/RE:X/U:X

EPSS: 0.006940000 probability, percentile 0.511020000 (date 2026-09-21)

Problem Types: CWE-288 | CWE-288 CWE-288 Authentication bypass using an alternate path or channel

VersionSourceTypeScoreSeverityVector
4.002762ae7-200e-4b20-9b2b-a77d5b8fc4cbSecondary7.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/C...
4.0CNACVSS7.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
None
Sub Conf.
High
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/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:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Kong Kong Enterprise Gateway affected 3.15.0.0 3.15.0.3 custom Linux
CNA Kong Kong Enterprise Gateway affected 3.14.0.0 3.14.0.12 custom Linux
CNA Kong Kong Enterprise Gateway affected 3.13.0.0 3.13.0.9 custom Linux
CNA Kong Kong Enterprise Gateway affected 3.12.0.0 3.12.0.10 custom Linux
CNA Kong Kong Enterprise Gateway affected 3.10.0.0 3.10.0.17 custom Linux
CNA Kong Kong Enterprise Gateway affected 3.4.0.0 3.4.3.29 custom Linux

References

ReferenceSourceLinkTags
developer.konghq.com/gateway/changelog 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb developer.konghq.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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