Vulnerability	Vulnerable Version
M Expected Behavior Violation Affected versions of this package are vulnerable to Expected Behavior Violation via the `HPackParser` function when the gRPC client is communicating with an HTTP/2 proxy, allowing the attacker to poison the HPACK table. By manipulating the header encoding and poisoning the HPACK table between the proxy and the backend, an attacker can cause other gRPC clients to see failed requests or potentially leak HTTP header keys but not their values. This vulnerability exists because the error status for a misencoded header is not cleared between header reads, resulting in subsequent (incrementally indexed) added headers in the first request being poisoned until cleared from the HPACK table. How to fix Expected Behavior Violation? Upgrade `grpcio` to version 1.58.3, 1.59.5, 1.60.2, 1.62.3, 1.63.2, 1.64.3, 1.65.4 or higher.	[,1.58.3)[1.59.0,1.59.5)[1.60.0,1.60.2)[1.62.0,1.62.3)[1.63.0,1.63.2)[1.64.0,1.64.3)[1.65.0,1.65.4)

Expected Behavior Violation

Affected versions of this package are vulnerable to Expected Behavior Violation via the HPackParser function when the gRPC client is communicating with an HTTP/2 proxy, allowing the attacker to poison the HPACK table. By manipulating the header encoding and poisoning the HPACK table between the proxy and the backend, an attacker can cause other gRPC clients to see failed requests or potentially leak HTTP header keys but not their values.

This vulnerability exists because the error status for a misencoded header is not cleared between header reads, resulting in subsequent (incrementally indexed) added headers in the first request being poisoned until cleared from the HPACK table.

How to fix Expected Behavior Violation?

Upgrade grpcio to version 1.58.3, 1.59.5, 1.60.2, 1.62.3, 1.63.2, 1.64.3, 1.65.4 or higher.

[,1.58.3)[1.59.0,1.59.5)[1.60.0,1.60.2)[1.62.0,1.62.3)[1.63.0,1.63.2)[1.64.0,1.64.3)[1.65.0,1.65.4)

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