2.7
Low
CVE-2026-34520 AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, the C parser (the default for most installs) accepted null bytes and control characters in response headers. This issue has been patched in version 3.13.4.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| aiohttp 3.13 | earliest → < 3.13.4 | 3.13.4 |
Other CVEs of aiohttp
The 53 CVEs of aiohttp →
CVE-2026-111750
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
6.3
Medium
CVE-2026-111749
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
2.3
Low
CVE-2026-111748
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
6.3
Medium
CVE-2026-111066
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
8.2
High