SAML Authentication Bypass in Kong SAML Plugin
CVE-2026-14917

7.7HIGH

Key Information:

Vendor

Kong

Status
Kong Enterprise Gateway
Vendor
CVE Published:
16 September 2026

What is CVE-2026-14917?

A vulnerability in the Kong SAML plugin allows unauthenticated remote attackers to bypass SAML authentication. When the validate_assertion_signature option is set to false—an action that removes essential cryptographic verification—the plugin can accept unsigned SAML assertions. This flaw enables attackers to craft malicious SAML responses, potentially impersonating any user, including those with administrative privileges. Users are advised to ensure that the validation option is enabled to mitigate these risks effectively.

Affected Version(s)

Kong Enterprise Gateway Linux 3.15.0.0 < 3.15.0.3

Kong Enterprise Gateway Linux 3.14.0.0 < 3.14.0.12

Kong Enterprise Gateway Linux 3.13.0.0 < 3.13.0.9

References

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

CVSS V4

Score:
7.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.