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Moderate severityOSV Advisory· Published Jan 5, 2026· Updated Jan 6, 2026

AIOHTTP vulnerable to denial of service through large payloads

CVE-2025-69228

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below allow a request to be crafted in such a way that an AIOHTTP server's memory fills up uncontrollably during processing. If an application includes a handler that uses the Request.post() method, an attacker may be able to freeze the server by exhausting the memory. This issue is fixed in version 3.13.3.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
aiohttpPyPI
< 3.13.33.13.3

Affected products

55

Patches

Vulnerability mechanics

References

4

News mentions

0

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