CVE-2026-14917

Kong API Gateway Enterprise: SAML Authentication bypass

State: Published
Severity: 7.7 High
Published: Sep 16, 2026
Updated: Sep 16, 2026
Reserved: Jul 7, 2026

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

Scores

CVSS	Score	Vector	Source
4.0	7.7 High	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	Kong

Weaknesses

CWE-288 Authentication bypass using an alternate path or channel

Affected Products

Product	Versions
Kong Enterprise GatewayKong	3.15.0.0 to before 3.15.0.3Affected 3.14.0.0 to before 3.14.0.12Affected 3.13.0.0 to before 3.13.0.9Affected 3.12.0.0 to before 3.12.0.10Affected 3.10.0.0 to before 3.10.0.17Affected 3.4.0.0 to before 3.4.3.29Affected

References

https://developer.konghq.com/gateway/changelog/#3-15-0-3patch

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