CVE-2026-14917

Kong API Gateway Enterprise: SAML Authentication bypass

Published Sep 16, 2026 CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed
Description
A 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

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Kong
Kong kong Enterprise Gateway
Vendors & Products Kong
Kong kong Enterprise Gateway
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A 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
Title Kong API Gateway Enterprise: SAML Authentication bypass
Weaknesses CWE-288
References
Metrics cvssV4_0

{'score': 7.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Kong
Published
Updated
Sep 16, 2026, 1:26 PM
Reserved
Jul 7, 2026, 7:14 AM
Status
Awaiting Analysis
Published
Sep 16, 2026, 10:16 AM
Modified
Sep 18, 2026, 7:07 PM