Summary
WSO2 is warning of active exploitation of a critical authentication bypass vulnerability (CVE-2026-5430) that allows attackers to take over administrative accounts and steal sensitive API credentials. The flaw affects multiple middleware products and has been targeted in the wild since mid-September 2026.
Take Action:
If you run WSO2 API Manager, API Control Plane, Traffic Manager, or Universal Gateway, check for affected versions and patch immediately to the latest update level from WSO2. If you are using open source version apply the public GitHub fix. Attackers are already using forged tokens to gain full admin access.
After patching, assume your secrets were exposed and rotate all API keys, backend credentials, consumer keys, and application secrets, and check your logs for suspicious access since September 13, 2026.
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This article was originally published on BeyondMachines
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