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TI-2026-76532 Aliases CVE-2026-111750GHSA-pqxq-w44r-73xw

Request smuggling in aiohttp pure-Python HTTP parser

Priority LOW 34CWE-444Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · Low · Low
Fix status
Partial Red Hat: 1 fixed, 13 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

The aiohttp package from aio-libs before 3.14.4 has a pure-Python HTTP parser that accepts ambiguous request framing (CWE-444, Inconsistent Interpretation of HTTP Requests). An unauthenticated remote attacker can smuggle requests when an application runs with AIOHTTP_NO_EXTENSIONS or without a standard wheel and an intermediary parses the framing differently. The CVSS 4.0 base score is 6.3 (medium).

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, the pure Python parser accepts ambiguous HTTP request framing. An unauthenticated attacker can consequently smuggle requests when an application uses AIOHTTP_NO_EXTENSIONS or otherwise runs without a standard wheel and an intermediary interprets the framing differently. This issue is fixed in version 3.14.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00382 32nd percentileScored 2026-11-07
Fix Partial aiohttp (aio-libs): 3.14.4aiohttp (PyPI): 3.14.4Red Hat: 6 advisoriesRed Hat: 1 fixed, 13 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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 3.14.43.14.4Patch availableCNA
—aiohttp (PyPI)before 3.14.43.14.4Patch availableGHSA-pqxq-w44r-73xw
  • aiohttp Vendoraio-libs Affected before 3.14.4 Fixed in 3.14.4 Patch available CNA
  • aiohttp (PyPI) Vendor— Affected before 3.14.4 Fixed in 3.14.4 Patch available GHSA-pqxq-w44r-73xw

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*——Aiohttp
  • cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:* Versions — — ·Aiohttp

Remediation

Upgrade aiohttp to version 3.14.4. Red Hat fixes Red Hat AI Inference Server 3.5 in RHSA-2026:94738, RHSA-2026:94721, RHSA-2026:94717, RHSA-2026:94715, RHSA-2026:94709 and RHSA-2026:94702. The sources list no fixed version for Exploit Intelligence (no fix planned), Lightspeed Core (none available), Migration Toolkit for Applications 8, OpenShift Lightspeed and other products.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA aiohttp (aio-libs) Fixed in 3.14.4
  • Fix · GHSA-pqxq-w44r-73xw aiohttp (PyPI) Fixed in 3.14.4 Advisory →

Red Hat 6 advisories

  • RHSA-2026:94738 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference 3.5.3 (CUDA)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-cuda-rhel9
  • RHSA-2026:94721 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference Tech Preview 3.5.3 (Gaudi)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-gaudi-rhel9
  • RHSA-2026:94717 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference 3.5.3 (Spyre)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-spyre-rhel9
Show 3 more Red Hat advisories
  • RHSA-2026:94715 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference Model Optimization Tools 3.5.3 (CUDA)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/model-opt-cuda-rhel9
  • RHSA-2026:94709 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference 3.5.3 (ROCm)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-rocm-rhel9
  • RHSA-2026:94702 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Inference 3.5.3 (CPU)
    • Red Hat AI Inference Server 3.5 registry.redhat.io/rhaii/vllm-cpu-rhel9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Exploit IntelligenceAffectedNo fix planned: Out of support scope
Lightspeed CoreAffectedNo fix yet: Fix deferred
Migration Toolkit for Applications 8AffectedNo fix yet: Fix deferred
OpenShift LightspeedAffectedNo fix yet: Fix deferred
Red Hat AI Inference ServerAffectedNo fix yet: Fix deferred
Red Hat Ansible Automation Platform 2AffectedNo fix yet: Fix deferred
Red Hat Ansible Automation Platform Ansible Core 2AffectedNo fix yet: Fix deferred
Red Hat Discovery 2AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet: Fix deferred
Red Hat Lightspeed Services for OCPAffectedNo fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred
Red Hat Satellite 6AffectedNo fix yet: Fix deferred
Red Hat Update Infrastructure 4 for Cloud ProvidersAffectedNo fix planned: Out of support scope
Red Hat AI Inference Server 3.5Fixed RHSA-2026:94702, RHSA-2026:94709, RHSA-2026:94715, RHSA-2026:94717, RHSA-2026:94721, RHSA-2026:94738

Timeline

  1. 2026-10-19 Threatist record created from CVE-2026-111750
  2. 2026-10-20 Affected versions changed · Red Hat
  3. 2026-10-20 CVSS score added · Red Hat
  4. 2026-10-21 Alias added: GHSA-pqxq-w44r-73xw
  5. 2026-10-21 Fix available: PyPI/[email protected] · GHSA-pqxq-w44r-73xw
  6. 2026-10-21 CVSS score added · GHSA-pqxq-w44r-73xw
  7. 2026-10-21 Weakness changed · GHSA-pqxq-w44r-73xw
  8. 2026-10-21 5 new references · GHSA-pqxq-w44r-73xw
  9. 2026-10-21 Priority changed: MEDIUM → LOW
  10. 2026-10-28 CISA SSVC decision points changed
  11. 2026-11-04 Fix available: RHSA-2026:94717 · Red Hat
  12. 2026-11-04 Fix available: RHSA-2026:94715 · Red Hat
  13. 2026-11-04 Fix available: RHSA-2026:94709 · Red Hat
  14. 2026-11-04 Fix available: RHSA-2026:94738 · Red Hat
  15. 2026-11-04 Fix available: RHSA-2026:94702 · Red Hat
  16. 2026-11-04 Fix available: RHSA-2026:94721 · Red Hat
  17. 2026-11-04 Fix available: Red Hat AI Inference Server 3.5 · Red Hat

References

Advisory 1

Other 4

  • 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-2023-26746 aiohttp's ClientSession is vulnerable to CRLF injection via version CVSS 3.1HIGH 7.2
  • TI-2026-66145 Multidict: Reference leak in CIMultiDict/MultiDict items-view union and subtraction 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