CVE-2026-111064

aiohttp server lacks an initial request/header timeout

HIGH
8.2
CVSS Score
Published: October 19, 2026 at 04:47 PM UTC
Updated: October 28, 2026 at 04:17 PM UTC
1 product affected across 1 vendorAiohttp

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Severity
HIGH8.2
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, keepalive timeout handling is absent during the initial portion of a request. An attacker can keep an idle connection open indefinitely before sending any request data, consuming server connection capacity. This issue is fixed in version 3.14.4.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.14.4

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHGitHub_M
Vector?

Quick Info

StatusUNDERGOING ANALYSIS
CWE
CWE-770

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