CVE-2023-39326

Summary

CVE-2023-39326 is a cybersecurity vulnerability affecting HTTP chunked encoding readers, specifically the net/http implementation in certain programming languages. A malicious sender can manipulate chunk extensions to force receivers to read significantly more data from the network than intended. This can result in a server unintentionally consuming up to 1GB of data when handling failed request bodies. The issue arises due to the discard of metadata in the net/http chunked encoding reader, allowing senders to insert large metadata segments and cause the reader to produce errors when the ratio of real body to encoded bytes becomes too small.

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