Description
aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation makes it possible for an attacker to modify the HTTP request (e.g. insert a new header) or even create a new HTTP request if the attacker controls the HTTP method. The vulnerability occurs only if the attacker can control the HTTP method (GET, POST etc.) of the request. If the attacker can control the HTTP version of the request it will be able to modify the request (request smuggling). This issue has been patched in version 3.9.0.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| aio-libs | aiohttp | < 3.9.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | python-aiohttp | 3.9.1-1 | — |
| Debian 13 | python-aiohttp | 3.9.1-1 | — |
| Debian 12 | python-aiohttp | 3.8.4-1+deb12u1 | DSA-5828-1 |
| Debian 11 | python-aiohttp | 3.7.4-1+deb11u1 | DLA-4041-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | python-aiohttp | 3.9.1-1ubuntu0.1+esm1 | USN-7642-1 |
| Ubuntu Pro 22.04 LTS | python-aiohttp | 3.8.1-4ubuntu0.2+esm1 | USN-7642-1 |
| Ubuntu Pro 20.04 LTS | python-aiohttp | 3.6.2-1ubuntu1+esm4 | USN-7642-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | python-aiohttp | 3.0.1-1ubuntu0.1~esm5 | USN-7642-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Satellite Utils 6 | foreman +1 | 3.9.1.6-1.el8sat | RHSA-2024:2010 |
| Red Hat Satellite Capsule 6 | foreman +1 | 3.9.1.6-1.el8sat | RHSA-2024:2010 |
| Red Hat Satellite Capsule 6 | puppetserver | 7.14.0-1.el8sat | RHSA-2024:2010 |
| Red Hat Satellite Capsule 6 | python-aiohttp +1 | 3.9.2-1.el8pc | RHSA-2024:2010 |
| Red Hat Satellite Capsule 6 | python-django +1 | 4.2.9-1.el8pc | RHSA-2024:2010 |
| Red Hat Satellite Capsule 6 | python-galaxy-importer +1 | 0.4.19-2.el8pc | RHSA-2024:2010 |
| Red Hat Satellite Capsule 6 | python-jinja2 +1 | 3.1.3-1.el8pc | RHSA-2024:2010 |
| Red Hat Satellite Capsule 6 | python-pycryptodomex +1 | 3.20.0-1.el8pc | RHSA-2024:2010 |
| Red Hat Satellite Capsule 6 | python-pygments +1 | 2.17.0-1.el8pc | RHSA-2024:2010 |
| Red Hat Satellite Capsule 6 | rubygem-activesupport | 6.1.7.6-1.el8sat | RHSA-2024:2010 |
| Red Hat Satellite 6 | foreman +14 | 3.9.1.6-1.el8sat | RHSA-2024:2010 |
| Red Hat Satellite 6 | puppetserver | 7.14.0-1.el8sat | RHSA-2024:2010 |
| Red Hat Satellite 6 | python-aiohttp +1 | 3.9.2-1.el8pc | RHSA-2024:2010 |
| Red Hat Satellite 6 | python-django +1 | 4.2.9-1.el8pc | RHSA-2024:2010 |
| Red Hat Satellite 6 | python-galaxy-importer +1 | 0.4.19-2.el8pc | RHSA-2024:2010 |
| Red Hat Satellite 6 | python-jinja2 +1 | 3.1.3-1.el8pc | RHSA-2024:2010 |
| Red Hat Satellite 6 | python-pycryptodomex +1 | 3.20.0-1.el8pc | RHSA-2024:2010 |
| Red Hat Satellite 6 | python-pygments +1 | 2.17.0-1.el8pc | RHSA-2024:2010 |
| Red Hat Satellite 6 | rubygem-activesupport | 6.1.7.6-1.el8sat | RHSA-2024:2010 |
| Red Hat Satellite 6 | rubygem-audited | 5.4.2-1.el8sat | RHSA-2024:2010 |
| Red Hat Satellite 6 | rubygem-puma | 6.4.2-1.el8sat | RHSA-2024:2010 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhui 4 | python-aiohttp +1 | 3.9.2-1.el8ui | RHSA-2024:1878 |
| Red Hat Rhui 4 | python-cryptography +1 | 41.0.6-1.el8ui | RHSA-2024:1878 |
| Red Hat Rhui 4 | python-django +1 | 4.2.11-1.el8ui | RHSA-2024:1878 |
| Red Hat Rhui 4 | python-ecdsa +1 | 0.18.0-4.el8ui | RHSA-2024:1878 |
| Red Hat Rhui 4 | python-jinja2 +1 | 3.1.3-1.el8ui | RHSA-2024:1878 |
| Red Hat Ansible Automation Platform Inside 2 | python-jinja2 +1 | 3.1.3-1.el9ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform Inside 2 | python-pygments +1 | 2.17.2-1.el9ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform Inside 2 | python39-jinja2 +1 | 3.1.3-1.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform Inside 2 | python39-pygments +1 | 2.17.2-1.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform Developer 2 | python-jinja2 +1 | 3.1.3-1.el9ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform Developer 2 | python-pygments +1 | 2.17.2-1.el9ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform Developer 2 | python39-jinja2 +1 | 3.1.3-1.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform Developer 2 | python39-pygments +1 | 2.17.2-1.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-installer | 2.4-6.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | ansible-rulebook +3 | 1.0.5-1.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python-aiohttp +1 | 3.9.1-1.el9ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python-django +1 | 4.2.10-1.el9ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python-jinja2 +1 | 3.1.3-1.el9ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python-pillow +1 | 10.0.1-1.el9ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python-pycryptodomex +1 | 3.20.0-1.el9ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python-pygments +1 | 2.17.2-1.el9ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python39-aiohttp +1 | 3.9.1-1.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python39-django +1 | 4.2.10-1.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python39-jinja2 +1 | 3.1.3-1.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python39-pillow +1 | 10.0.1-1.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python39-pycryptodomex +1 | 3.20.0-1.el8ap | RHSA-2024:1057 |
| Red Hat Ansible Automation Platform 2 | python39-pygments +1 | 2.17.2-1.el8ap | RHSA-2024:1057 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 3 | python-aiohttp | 3.8.6-150400.10.11.1 | SUSE-SU-2024:0168-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | python-aiohttp | 3.8.6-150400.10.11.1 | SUSE-SU-2024:0168-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | py3-cassandra-medusa +1 | 0.19.1-r1 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | aiohttp | < 3.9.0 | 3.9.0 | GHSA-qvrw-v9rv-5rjx |
Advisories 9
- RHSA-2024:2010 Red Hat Security Advisory: Satellite 6.15.0 release Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2024:1057 Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.4 Product Security and Bug Fix Update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2024:1878 Red Hat Security Advisory: RHUI 4.8 Release - Security Updates, Bug Fixes, and Enhancements Red Hat Security Advisories (RHSA) · Sep 9, 2026
- USN-7642-1 python-aiohttp vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5828-1 python-aiohttp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4041-1 python-aiohttp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2024:0168-1 Security update for python-aiohttp SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-0949 Red Hat Satellite: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 26, 2026
- WID-SEC-2024-0522 Red Hat Ansible Automation Platform: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 24, 2025