CVE-2026-111748
Medium
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, an attacker can send an absolute-form request that causes Request.scheme to use attacker-controlled request-target scheme data instead of the connection protocol. Applications that use Request.scheme for security decisions can consequently be tricked into treating an unencrypted connection as encrypted or an encrypted connection as unencrypted. This issue is fixed in version 3.14.4.
SeverityMedium
CVSS6.3
Exploit probability—
ProductAiohttp
PublishedOct 19, 2026
First seenOct 19, 2026
Weakness typeCWE-807CWE-807
How to fix
Update
- aiohttp3.14.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| aiohttpPyPI | v < 3.14.4 | 3.14.4 |
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