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TI-2023-26746 Aliases CVE-2023-49081GHSA-q3qx-c6g2-7pw2

aiohttp's ClientSession is vulnerable to CRLF injection via version

Priority HIGH 65CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Partial Red Hat: 5 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation made it possible for an attacker to modify the HTTP request (e.g. to insert a new header) or create a new HTTP request if the attacker controls the HTTP version. The vulnerability only occurs if the attacker can control the HTTP version of the request. This issue has been patched in version 3.9.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00882 59th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial aiohttp (aio-libs): 3.9.0aiohttp (PyPI): 3.9.0Red Hat: 4 advisoriesRed Hat: 5 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
aio-libsaiohttpbefore 3.9.03.9.0Patch availableCNA
—aiohttp (PyPI)before 3.9.03.9.0Patch availableGHSA-q3qx-c6g2-7pw2
  • aiohttp Vendoraio-libs Affected before 3.9.0 Fixed in 3.9.0 Patch available CNA
  • aiohttp (PyPI) Vendor— Affected before 3.9.0 Fixed in 3.9.0 Patch available GHSA-q3qx-c6g2-7pw2

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*before 3.9.0VulnerableAiohttp
  • cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:* Versions before 3.9.0 Vulnerable ·Aiohttp

Remediation

  • Fix · CNA aiohttp (aio-libs) Fixed in 3.9.0
  • Fix · GHSA-q3qx-c6g2-7pw2 aiohttp (PyPI) Fixed in 3.9.0 Advisory →

Red Hat 4 advisories

  • RHSA-2024:2010 Released 2024-04-23 · Red Hat rating Important
    Satellite 6.15.0 release
    • Red Hat Satellite 6.15 for RHEL 8 foreman-3.9.1.6-1.el8sat, foreman-cli-3.9.1.6-1.el8sat, foreman-debug-3.9.1.6-1.el8sat +28
  • RHSA-2024:1878 Released 2024-04-18 · Red Hat rating Moderate
    RHUI 4.8 Release - Security Updates, Bug Fixes, and Enhancements
    • RHUI 4 for RHEL 8 python-aiohttp-3.9.2-1.el8ui, python-cryptography-41.0.6-1.el8ui, python-django-4.2.11-1.el8ui +7
  • RHSA-2024:1536 Released 2024-03-27 · Red Hat rating Moderate
    Satellite 6.14.3 Async Security Update
    • Red Hat Satellite 6.14 for RHEL 8 python-aiohttp-3.9.2-0.1.el8pc, python-django-3.2.22-1.el8pc, python-galaxy-importer-0.4.18-2.el8pc +5
Show 1 more Red Hat advisories
  • RHSA-2024:1057 Released 2024-02-29 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.4 Product Security and Bug Fix Update
    • Red Hat Ansible Automation Platform 2.4 for RHEL 8 ansible-automation-platform-installer-2.4-6.el8ap, ansible-rulebook-1.0.5-1.el8ap, automation-eda-controller-1.0.5-1.el8ap +14
    • Red Hat Ansible Automation Platform 2.4 for RHEL 9 ansible-automation-platform-installer-2.4-6.el9ap, ansible-rulebook-1.0.5-1.el9ap, automation-eda-controller-1.0.5-1.el9ap +14

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Ansible Automation Platform 1.2AffectedNo fix planned: Will not fix
Red Hat Satellite 6AffectedNo fix planned: Out of support scope
RHUI 4 for RHEL 8Fixed RHSA-2024:1878
Red Hat Ansible Automation Platform 2.4 for RHEL 8Fixed RHSA-2024:1057
Red Hat Ansible Automation Platform 2.4 for RHEL 9Fixed RHSA-2024:1057
Red Hat Satellite 6.14 for RHEL 8Fixed RHSA-2024:1536
Red Hat Satellite 6.15 for RHEL 8Fixed RHSA-2024:2010
Not affected: 5 products
  • RHUI 4 for RHEL 8
  • Red Hat Ansible Automation Platform 2.4 for RHEL 8
  • Red Hat Ansible Automation Platform 2.4 for RHEL 9
  • Red Hat Satellite 6.14 for RHEL 8
  • Red Hat Satellite 6.15 for RHEL 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-49081
  2. 2026-10-03 Alias added: GHSA-q3qx-c6g2-7pw2

References

Exploit 2

Advisory 1

Other 7

  • TI-2025-38826 aiomysql allows arbitrary access to client files through vulnerability of a malicious MySQL server CVSS 4.0HIGH 8.2
  • TI-2024-15436 aiohttp.web.static(follow_symlinks=True) is vulnerable to directory traversal CVSS 3.1HIGH 7.5
  • TI-2023-25769 Request smuggling in aiohttp CVSS 3.1HIGH 7.5
  • TI-2023-18906 aiohttp vulnerable to HTTP request smuggling CVSS 3.1HIGH 7.5
  • TI-2026-66145 Multidict: Reference leak in CIMultiDict/MultiDict items-view union and subtraction CVSS 3.1MEDIUM 5.3
  • TI-2023-26747 aiohttp's ClientSession is vulnerable to CRLF injection via method CVSS 3.1MEDIUM 5.3
See all 59 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences