Improper Handling of Exceptional Conditions

Overview valibot is a The modular and type safe schema library for validating structural data Affected versions of this package are vulnerable to Improper Handling of Exceptional Conditions in the flatten process. An attacker can cause the application to throw a TypeError and disrupt normal error...

CVE-2026-59724

A flaw was found in Engine.IO. When Engine.IO servers have WebTransport enabled, a remote attacker can craft a session ID to resolve an inherited property of the clients object during WebTransport upgrade handling. This can lead to a TypeError, resulting in a denial of service DoS for the server...

engine.io: Engine.IO: Denial of Service via crafted WebTransport session ID

A flaw was found in Engine.IO. When Engine.IO servers have WebTransport enabled, a remote attacker can craft a session ID to resolve an inherited property of the clients object during WebTransport upgrade handling. This can lead to a TypeError, resulting in a denial of service DoS for the server...