Vulnerability RUSTSEC-2026-0448
Summary
Unbounded decompression can exhaust memory and CPU resources
Details
The encoding::Decoder stream can expand compressed input into a large output buffer before a caller can enforce its body size limit. An attacker who controls a compressed request or response can cause excessive memory allocation and CPU use, resulting in denial of service.
This affects applications that decode untrusted gzip, deflate, Brotli, or Zstandard bodies with the corresponding compression feature enabled.
Upgrade to actix-http 3.20.1 or later and configure Decoder::limit() when using the decoder directly. Actix Web users must also upgrade to actix-web 4.18.2 or later so that extractors pass their limits to the decoder.
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