CVE-2026-111748

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.

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Weakness Type (CWE)

CWE-807 CWE-807

References

Other References

https://github.com/aio-libs/aiohttp/commit/6d4e7b01f9b951aa084a75d7356e907d4ee80411 https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4 https://github.com/aio-libs/aiohttp/security/advisories/GHSA-f9xw-jh8m-3mwq

Frequently Asked Questions

What is CVE-2026-111748? +

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.

How do I check if I'm vulnerable to CVE-2026-111748? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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