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aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. The HTTP parser in AIOHTTP has numerous problems with header parsing, which could lead to request smuggling. This parser is only used when AIOHTTP_NO_EXTENSIONS is enabled (or not using a prebuilt wheel). These bugs have been addressed in commit `d5c12ba89` which has been included in release version 3.8.6. Users are advised to upgrade. There are no known workarounds for these issues.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade python-aiohttp | Dec 16, 2024 | Nov 14, 2023 |
| Splunk | — | Upgrade Splunk Enterprise to version 9.1.5Upgrade Splunk Enterprise to version 9.2.2Upgrade Splunk Enterprise to version 9.0.10 | Sep 30, 2025 | Nov 14, 2023 |
| Suse | — | Upgrade python311-aiohttp | Feb 22, 2024 | Nov 14, 2023 |
| Ubuntu | — | Upgrade python3-aiohttp (Ubuntu Pro) | Jul 11, 2025 | Nov 14, 2023 |
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