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CVE-2025-69228 — AIOHTTP vulnerable to denial of service through large payloads

2026-09-29T16:56:56.316780+00:00

Affected: aio-libs aiohttp

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.

GHSA-6jhg-hg63-jvvf — AIOHTTP vulnerable to denial of service through large payloads

2026-09-29T16:56:56.316842+00:00

Affected: PyPI: aiohttp

### Summary A request can be crafted in such a way that an aiohttp server's memory fills up uncontrollably during processing.

### Impact 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.

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Patch: https://github.com/aio-libs/aiohttp/commit/b7dbd35375aedbcd712cbae8ad513d56d11cce60

PYSEC-2026-1100 — AIOHTTP vulnerable to denial of service through large payloads

2026-09-29T16:56:56.316875+00:00

Affected: PyPI: aiohttp

### Summary A request can be crafted in such a way that an aiohttp server's memory fills up uncontrollably during processing.

### Impact 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.

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Patch: https://github.com/aio-libs/aiohttp/commit/b7dbd35375aedbcd712cbae8ad513d56d11cce60