CVE-2026-34515

Publication date 1 April 2026

Last updated 7 August 2026

Ubuntu priority

Cvss 3 Severity Score

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, on Windows the static resource handler may expose information about a NTLMv2 remote path. This issue has been patched in version 3.13.4.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python-aiohttp	26.04 LTS resolute	Not affected
	25.10 questing	Ignored end of life, was needs-triage
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Ignored end of ESM support, was needs-triage

Notes

mrmajumder

Windows only, does not affect any Ubuntu releases

Severity score breakdown

CVSS version:

Base score 6.6 · Medium

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Attack requirements	None
Privileges required	None
User interaction	None
Vulnerable system - Confidentiality impact	High
Vulnerable system - Integrity impact	None
Vulnerable system - Availability impact	None
Subsequent system - Confidentiality impact	None
Subsequent system - Integrity impact	None
Subsequent system - Availability impact	None

Scores

Parameter	Value
Base score	6.6 · Medium
Base + Threat score	-
Base + Environmental score	-
Base + Threat + Environmental score	-

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

Base score 7.5 · High