aiohttp: Unread Compressed Request Bodies Bypass client_max_size During Cleanup
### Summary During cleanup it is possible for a compressed request body to be decompressed into memory in one chunk. ### Impact An attacker may be able to send a compressed payload in specific situations that could be decompressed into memory, potentially leading to DoS (a zip bomb edge case). ### Workaround Disable compression if unable to upgrade. ----- Patch: https://github.com/aio-libs/aiohttp/commit/4f7480e474cccc6a8cc2c92ad3f17a31dedf8232
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-54278US | high7.5 | — | ||
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, during cleanup it is possible for a compressed request body to be decompressed into… | ||||
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