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Improper Handling of Highly Compressed Data (Data Amplification)

CVE-2026-54278

Medium
6.6/10

Summary

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 memory in one chunk. An attacker may be able to send a compressed payload in specific situations that could be decompressed into memory, potentially leading to Denial-of-Service (a zip bomb edge case). This vulnerability is fixed in 3.14.1.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • HIGH

CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)

The software does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.

References

Advisory Timeline

  • Published