In short
- CVE-2026-111066 is a HIGH (CVSS 8.2) vulnerability affecting aiohttp.
- Chance of exploitation in the next 30 days (EPSS): 0.41%, higher than 35.4% of all vulnerabilities.
- Fix: update to 3.14.4 or later.
| Package | Affected versions | Patched versions |
|---|
| aiohttp PyPI | ≥ 2.0.0, < 3.14.4
| 3.14.4
|
Description
Summary
An attacker can exhaust file descriptors with specially crafted multipart requests.
Impact
If a handler uses Request.post(), it may be possible for an attacker to use an unlimited number of file descriptors, potentially resulting in resource exhaustion.
NVD 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.
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