Allocation of Resources Without Limits or Throttling Affecting aiohttp package, versions [,3.14.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published19 Oct 2026
- disclosed19 Oct 2026
- credittatulea
Introduced: 19 Oct 2026
NewCVE-2026-111064 (opens in a new tab)How to fix?
Upgrade aiohttp to version 3.14.4 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via RequestHandler in aiohttp/web_protocol.py, where idle connections that never send a request are not closed. Because _keepalive is initialised to False and no keepalive timeout is scheduled at connection establishment, a remote attacker can open a large number of connections without sending any request, exhausting server resources and causing a crash.