CVE-2025-69229

unknown

Published 2026-01-05 · Modified 2026-02-04

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks. If an application makes use of the request.read() method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time. This issue is fixed in version 3.13.3.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

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OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Mixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`3.11.16-1+deb13u1`
sid	Fixed	`3.13.3-1`
forky	Fixed	`3.13.3-1`
bullseye	Fixed	`3.7.4-1+deb11u2`
bookworm	Affected	—

Package impact

Ecosystem	Package	Vulnerable	Fixed
PyPI	aiohttp	`<3.13.3`	`3.13.3`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.