Allocation of Resources Without Limits or Throttling in aiohttp - CVE-2026-22815

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Main Vulnerability Database Vulnerabilities #VU127955

Allocation of Resources Without Limits or Throttling in aiohttp - CVE-2026-22815

Published: April 26, 2026


Vulnerability identifier: #VU127955
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2026-22815
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to allocation of resources without limits or throttling in header/trailer handling when processing an attacker-controlled request or response. A remote attacker can send a specially crafted request or response to cause a denial of service.


Affected software

aiohttp
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Desktop 15
SUSE Manager Proxy
SUSE Manager Server
SUSE Manager Retail Branch Server
Public Cloud Module
Python 3 Module
openSUSE Leap
Ubuntu
openEuler
Python for Scientific Computing
Maximo Application Suite - Predict Component
python-aiohttp (Ubuntu package)
python3-aiohttp-debuginfo
python-aiohttp-debugsource
python3-aiohttp
python311-aiohttp-debuginfo
python311-aiohttp
python-aiohttp-debuginfo
python-aiohttp-help
python-aiohttp

How to mitigate CVE-2026-22815

Install security update from vendor's website.

aiohttp - update to 3.13.4
Python for Scientific Computing - update to 4.3.2
Maximo Application Suite - Predict Component - update to 9.2.1
python-aiohttp (Ubuntu package) - addressed in versions 0.20.2-1ubuntu0.1~esm1, 3.0.1-1ubuntu0.1~esm7, 3.6.2-1ubuntu1+esm6, 3.8.1-4ubuntu0.2+esm3, 3.9.1-1ubuntu0.1+esm3, 3.13.3-3ubuntu1+esm1
python3-aiohttp-debuginfo - update to 3.6.0-150100.3.35.1
python-aiohttp-debugsource - addressed in versions 3.6.0-150100.3.35.1, 3.9.3-150400.10.43.1
python3-aiohttp - update to 3.6.0-150100.3.35.1
python311-aiohttp-debuginfo - update to 3.9.3-150400.10.43.1
python311-aiohttp - update to 3.9.3-150400.10.43.1
python-aiohttp-debuginfo - update to 3.13.5-1
python3-aiohttp - update to 3.13.5-1
python-aiohttp-help - update to 3.13.5-1
python-aiohttp-debugsource - update to 3.13.5-1
python-aiohttp - update to 3.13.5-1

External References

Related Security Bulletins