Zapros, a Python HTTP client, prior to version 0.14.0 is vulnerable to denial of service via memory exhaustion. The issue affects all callers who streamed compressed responses relying on the chunk size — explicit ("iter_bytes(chunk_size=...)") or the default — to bound memory. The decoder ignored that bound, so a chunk could be far larger than requested and a single compressed response could overflow memory. Version 0.14.0 contains a patch. Some workarounds are available. Read the still-compressed body with "Response.iter_raw()" / "Response.async_iter_raw()", which bypass the built-in decoders, and decompress it yourself with an explicit output-size bound (e.g. "zlib"'s "max_length"), aborting once a configured limit is exceeded. Where feasible, send "Accept-Encoding: identity" to disable response compression so bodies are not decompressed client-side. Avoid decoding response bodies from untrusted servers.