CVE-2026-92439: Kong Gateway Enterprise SAML plugin audience restriction bypass

CVE-2026-92439 · Severity: info · Published 2026-11-10

Kong Gateway Enterprise's SAML authentication plugin fails to properly validate the intended audience of authentication assertions, allowing an attacker to replay SAML tokens issued for one service to gain unauthorized access to another service. This could enable account takeover or bypass of access controls in API gateway deployments relying on SAML authentication.

Technologies: Kong Gateway Enterprise. Vendors: Kong.

Quick answers

Is CVE-2026-92439 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-92439 being exploited in the wild.
How severe is CVE-2026-92439?
Informational severity, published 10 November 2026.
Which products and versions are affected?
Kong Gateway Enterprise <UNKNOWN>.
Is there a fix for CVE-2026-92439?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-92439 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-92439?
Check whether you run Kong Gateway Enterprise at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The SAML plugin in Kong Gateway Enterprise does not enforce AudienceRestriction validation on SAML assertions, allowing an assertion issued by an IdP for one Service Provider to be replayed against another Service Provider. This is a token reuse vulnerability where missing audience binding checks permit cross-service authentication. An attacker with access to a valid SAML assertion from any trusted IdP can use it to authenticate to Kong-protected APIs configured with SAML, provided the IdP is trusted by multiple services.

Affected products

  • Kong Gateway Enterprise <UNKNOWN>

References

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