CVE-2025-69227

Publication date 6 January 2026

Last updated 17 August 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below allow for an infinite loop to occur when assert statements are bypassed, resulting in a DoS attack when processing a POST body. If optimizations are enabled (-O or PYTHONOPTIMIZE=1), and the application includes a handler that uses the Request.post() method, then an attacker may be able to execute a DoS attack with a specially crafted message. This issue is fixed in version 3.13.3.

Status

Package Ubuntu Release Status
python-aiohttp 26.04 LTS resolute
Not affected
25.10 questing
Fixed 3.11.16-1ubuntu0.1
25.04 plucky Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 3.9.1-1ubuntu0.1+esm2
22.04 LTS jammy
Fixed 3.8.1-4ubuntu0.2+esm2
20.04 LTS focal
Fixed 3.6.2-1ubuntu1+esm5
18.04 LTS bionic Ignored backporting risks regression
16.04 LTS xenial Ignored end of ESM support, was ignored [backporting risks regression]

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
python-aiohttp

Severity score breakdown

CVSS version:

Base score 6.6 · Medium

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

Base score 7.5 · High

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-8032-1
    • AIOHTTP vulnerabilities
    • 13 February 2026

Other references

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