When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. If leveraged, say, between a proxy and a backend, this could lead to requests from the proxy being interpreted as containing headers from different proxy clients - leading to an information leak that can be used for privilege escalation or data exfiltration. We recommend upgrading beyond the commit contained in https://github.com/grpc/grpc/pull/32309
{ "nvd_published_at": "2023-06-09T11:15:09Z", "cwe_ids": [ "CWE-440" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2023-07-05T20:26:48Z" }