{"id":"CVE-2023-32731","details":"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/33005 https://github.com/grpc/grpc/pull/33005 \n","aliases":["GHSA-cfgp-2977-2fmm"],"modified":"2026-04-11T12:45:15.877651Z","published":"2023-06-09T11:15:09.303Z","related":["CGA-w63x-w6j8-rw9j","SUSE-SU-2024:0573-1","openSUSE-SU-2024:13621-1","openSUSE-SU-2024:13634-1"],"database_specific":{},"references":[{"type":"FIX","url":"https://github.com/grpc/grpc/pull/32309"},{"type":"FIX","url":"https://github.com/grpc/grpc/pull/33005"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/grpc/grpc","events":[{"introduced":"358bfb581feeda5bf17dd3b96da1074d84a6ef8d"},{"fixed":"0bf4a618b17a3f0ed61c22364913c7f66fc1c61a"}],"database_specific":{"cpe":"cpe:2.3:a:grpc:grpc:*:*:*:*:*:*:*:*","source":"CPE_FIELD","extracted_events":[{"introduced":"1.53.0"},{"fixed":"1.55.0"}]}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-32731.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}