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
Advisories

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Fixes

Solution

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Workaround

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History

Wed, 16 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Wed, 16 Sep 2026 10:15:00 +0000

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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Kong

Published:

Updated: 2026-09-16T13:26:06.116Z

Reserved: 2026-07-07T07:14:57.290Z

Link: CVE-2026-14917

cve-icon Vulnrichment

Updated: 2026-09-16T13:26:01.470Z

cve-icon NVD

Status : Received

Published: 2026-09-16T10:16:48.373

Modified: 2026-09-16T14:17:04.653

Link: CVE-2026-14917

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses