CVE-2026-111066: CWE-400: Uncontrolled Resource Consumption in aio-libs aiohttp
Description
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.
CVSS v4.0
Score 8.2high
Affected software
aio-libs
aiohttp
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-111066 affects aiohttp versions >=2 and <3.14.4. It is caused by uncontrolled resource consumption (CWE-400) due to multipart request processing retaining an unlimited number of open file descriptors. An unauthenticated attacker can exploit this by sending crafted multipart requests to a handler that uses Request.post(), leading to exhaustion of file descriptors and potential denial of service. The issue is resolved in aiohttp version 3.14.4.
Potential Impact
An unauthenticated attacker can cause denial of service by exhausting the server's file descriptors through specially crafted multipart requests. This can disrupt service availability for applications using affected aiohttp versions.
Mitigation Recommendations
Upgrade aiohttp to version 3.14.4 or later, where this vulnerability is fixed. No other mitigations are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-15T12:47:13.665Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad64dbc2cdf04f656724f85
Added to database: 10/19/2026, 17:05:00 UTC
Last enriched: 10/19/2026, 17:18:20 UTC
Last updated: 10/19/2026, 19:06:46 UTC
Views: 14
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