Allocation of Resources Without Limits or Throttling Affecting py3.12-anyio package, versions <4.14.2-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.12% (3rd percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-PY312ANYIO-19958150
  • published20 Sept 2026
  • disclosed18 Sept 2026

Introduced: 18 Sep 2026

NewCVE-2026-64847  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Minimos:latest py3.12-anyio to version 4.14.2-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream py3.12-anyio package and not the py3.12-anyio package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, AnyIO starts process-pool workers with standard error connected to a pipe that the parent never drains, even though the documented behavior redirects all three standard streams. Worker code that writes enough attacker-influenced data to sys.stderr can fill the pipe and block before returning the standard-output protocol response, causing the awaiting process-pool call to remain blocked indefinitely. Applications that run untrusted or faulty worker code capable of producing substantial standard-error output are affected. This issue is fixed in version 4.14.2.

CVSS Base Scores

version 3.1