CVE-2021-23365: Tyk Tyk-Identity-Broker

Critical severity, CVSS 9.1. EPSS: 1% chance of exploitation in the next 30 days.

The package github.com/tyktechnologies/tyk-identity-broker before 1.1.1 are vulnerable to Authentication Bypass via the Go XML parser which can cause SAML authentication bypass. This is because the XML parser doesn’t guarantee integrity in the XML round-trip (encoding/decoding XML data).

Affected products

• Tyk Tyk-Identity-Broker: before 1.1.1 (fixed in 1.1.1)

Published 2021-04-26. Last modified 2026-06-17.