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TI-2026-76529 Aliases CVE-2026-111066GHSA-9xw5-w5jj-pvcg

File descriptor exhaustion in AIOHTTP multipart request processing

Priority LOW 36CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 5 fixed, 10 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.

Summary

AIOHTTP from 2.0.0 before 3.14.4 can retain an unbounded number of open file descriptors while processing multipart requests. An unauthenticated remote attacker can exhaust file descriptors with crafted multipart requests when a handler uses Request.post(). The flaw is tied to CWE-770, allocation of resources without limits.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. From 2.0.0 until 3.14.4, multipart request processing can retain an unbounded number of open file descriptors. An unauthenticated attacker can consequently exhaust file descriptors with specially crafted multipart requests when a handler uses Request.post(). This issue is fixed in version 3.14.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00412 35th percentileScored 2026-11-07
Fix Partial aiohttp (aio-libs): 3.14.4aiohttp (PyPI): 3.14.4Red Hat: 11 advisoriesRed Hat: 5 fixed, 10 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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-libsaiohttp2.0.0 to before 3.14.43.14.4Patch availableCNA
—aiohttp (PyPI)2.0.0 to before 3.14.43.14.4Patch availableGHSA-9xw5-w5jj-pvcg
  • aiohttp Vendoraio-libs Affected 2.0.0 to before 3.14.4 Fixed in 3.14.4 Patch available CNA
  • aiohttp (PyPI) Vendor— Affected 2.0.0 to before 3.14.4 Fixed in 3.14.4 Patch available GHSA-9xw5-w5jj-pvcg

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, which fixes aio-libs aiohttp and PyPI aiohttp. Red Hat advisories RHSA-2026:94738, RHSA-2026:94721, RHSA-2026:94717, RHSA-2026:94715, RHSA-2026:94709, RHSA-2026:94702, RHSA-2026:94631, RHSA-2026:92856, RHSA-2026:92510, RHSA-2026:92136 and RHSA-2026:91967 fix it. The sources list no fixed version for Red Hat AI Inference Server and Red Hat Lightspeed Services for OCP, and none available for eight other products.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA aiohttp (aio-libs) Fixed in 3.14.4
  • Fix · GHSA-9xw5-w5jj-pvcg aiohttp (PyPI) Fixed in 3.14.4 Advisory →

Red Hat 11 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 8 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
  • RHSA-2026:94631 Released 2026-11-03 · Red Hat rating Critical
    GuideLLM 3.5.1
    • Red Hat OpenShift AI 3.5 registry.redhat.io/rhai/guidellm-rhel9
  • RHSA-2026:92856 Released 2026-10-29 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.6 Container Release Update
    • Red Hat Ansible Automation Platform 2.6 registry.redhat.io/ansible-automation-platform-26/ee-minimal-rhel9, registry.redhat.io/ansible-automation-platform-26/ee-supported-rhel9, registry.redhat.io/ansible-automation-platform-26/gateway-rhel9
  • RHSA-2026:92510 Released 2026-10-29 · Red Hat rating Critical
    RHOAI 3.4.6 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-cli-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9 +47
  • RHSA-2026:92136 Released 2026-10-28 · Red Hat rating Important
    A Subscription Management tool for finding and reporting Red Hat product usage
    • Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
  • RHSA-2026:91967 Released 2026-10-28 · Red Hat rating Important
    A Subscription Management tool for finding and reporting Red Hat product usage
    • Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Exploit IntelligenceAffectedNo fix yet
Lightspeed CoreAffectedNo fix yet
Migration Toolkit for Applications 8AffectedNo fix yet
OpenShift LightspeedAffectedNo fix yet
Red Hat AI Inference ServerAffectedNo fix planned: Will not fix
Red Hat Ansible Automation Platform 2AffectedNo fix yet
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet
Red Hat Lightspeed Services for OCPAffectedNo fix planned: Will not fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
Red Hat Satellite 6AffectedNo fix yet
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
Red Hat Ansible Automation Platform 2.6Fixed RHSA-2026:92856
Red Hat Discovery 2Fixed RHSA-2026:91967, RHSA-2026:92136
Red Hat OpenShift AI 3.4Fixed RHSA-2026:92510
Red Hat OpenShift AI 3.5Fixed RHSA-2026:94631
Not affected: 8 products
  • Red Hat AI Inference Server
  • Red Hat Ansible Automation Platform 2
  • Red Hat Ansible Automation Platform 2.6
  • Red Hat Ansible Automation Platform Ansible Core 2
  • Red Hat Discovery 2
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift AI 3.4
  • Red Hat Update Infrastructure 4 for Cloud Providers

Timeline

  1. 2026-10-19 Threatist record created from CVE-2026-111066
  2. 2026-10-20 Affected versions changed · Red Hat
  3. 2026-10-20 CVSS score added · Red Hat
  4. 2026-10-20 CISA SSVC decision points changed
  5. 2026-10-20 Priority changed: MEDIUM → LOW
  6. 2026-10-21 Alias added: GHSA-9xw5-w5jj-pvcg
  7. 2026-10-21 Fix available: PyPI/[email protected] · GHSA-9xw5-w5jj-pvcg
  8. 2026-10-21 CVSS score added · GHSA-9xw5-w5jj-pvcg
  9. 2026-10-21 Weakness changed · GHSA-9xw5-w5jj-pvcg
  10. 2026-10-21 5 new references · GHSA-9xw5-w5jj-pvcg
  11. 2026-10-21 Affected versions changed · Red Hat
  12. 2026-10-24 Affected versions changed · Red Hat
  13. 2026-10-30 Fix available: RHSA-2026:91967 · Red Hat
  14. 2026-10-30 Fix available: RHSA-2026:92136 · Red Hat
  15. 2026-10-30 Fix available: RHSA-2026:92510 · Red Hat
  16. 2026-10-30 Fix available: Red Hat Discovery 2, Red Hat OpenShift AI 3.4 · Red Hat
  17. 2026-10-30 Affected versions changed · Red Hat
  18. 2026-10-30 Fix available: Red Hat Ansible Automation Platform 2.6 · Red Hat
  19. 2026-10-31 Fix available: RHSA-2026:92856 · Red Hat
  20. 2026-11-04 Fix available: RHSA-2026:94717 · Red Hat
  21. 2026-11-04 Fix available: RHSA-2026:94715 · Red Hat
  22. 2026-11-04 Fix available: RHSA-2026:94709 · Red Hat
  23. 2026-11-04 Fix available: RHSA-2026:94738 · Red Hat
  24. 2026-11-04 Fix available: RHSA-2026:94702 · Red Hat
  25. 2026-11-04 Fix available: RHSA-2026:94631 · Red Hat
  26. 2026-11-04 Fix available: RHSA-2026:94721 · Red Hat
  27. 2026-11-04 Fix available: Red Hat AI Inference Server 3.5, Red Hat OpenShift AI 3.5 · Red Hat
  28. 2026-11-05 Affected versions changed · 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