Threats Tagged 'cve-2025-64763'
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Threats Tagged 'cve-2025-64763'
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CVE-2025-64763 is a low-severity vulnerability in Envoy proxy versions up to 1.36.2 that affects TCP proxy mode handling of CONNECT requests. Envoy accepts client data before sending a 2xx response and forwards it upstream, which can cause a de-synchronized CONNECT tunnel state if an upstream proxy rejects the connection with a non-2xx status. This behavior can lead to protocol state inconsistencies but does not directly impact confidentiality, integrity, or availability. The vulnerability arises from a protection mechanism failure (CWE-693) and can be mitigated by enabling the runtime flag envoy.reloadable_features.reject_early_connect_data to reject early data. No known exploits are reported in the wild, and the CVSS score is 3.7 (low). Join the discussion | CVE Database V5 | 12/03/2025, 18:13:58 UTC Added: 12/03/2025, 18:29:40 UTC |
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