CVE-2026-34516

Publication date 1 April 2026

Last updated 7 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. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched in version 3.13.4.

Status

Package Ubuntu Release Status
python-aiohttp 26.04 LTS resolute
Fixed 3.13.3-3ubuntu1+esm1
25.10 questing Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 3.9.1-1ubuntu0.1+esm3
22.04 LTS jammy
Fixed 3.8.1-4ubuntu0.2+esm3
20.04 LTS focal
Fixed 3.6.2-1ubuntu1+esm6
18.04 LTS bionic
Fixed 3.0.1-1ubuntu0.1~esm7
16.04 LTS xenial Ignored end of ESM support, was needs-triage

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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)

Other references

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