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CVE-2026-34519

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-34519

Severity

Unknown
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Summary

AIOHTTP: HTTP response splitting via \r in reason phrase

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an attacker who controls the reason parameter when creating a Response may be able to inject extra headers or similar exploits. This issue has been patched in version 3.13.4.

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