CVE-2026-111064
published 2026-10-19CVE-2026-111064: 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…
PriorityP351high8.2CVSS 4.0
AVNACLATPPRNUINVCNVINVAHSCNSINSANEXCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX
EPSS
0.40%
33.0th percentile
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
120 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| aio-libs | aiohttp | < 3.14.4 | 3.14.4 |
| aiohttp | aiohttp | >= 0 < 3.14.4 | 3.14.4 |
| ansible-automation-platform-24 | controller-rhel8 | — | — |
| ansible-automation-platform-25 | controller-rhel8 | — | — |
| ansible-automation-platform-25 | lightspeed-chatbot-rhel8 | — | — |
| ansible-automation-platform-26 | ansible-dev-tools-rhel9 | — | — |
| ansible-automation-platform-26 | controller-rhel9 | — | — |
| ansible-automation-platform-26 | de-minimal-rhel9 | — | — |
| ansible-automation-platform-26 | de-supported-rhel9 | — | — |
| ansible-automation-platform-26 | ee-minimal-rhel9 | — | — |
| ansible-automation-platform-26 | ee-supported-rhel9 | — | — |
| ansible-automation-platform-26 | hub-rhel9 | — | — |
| ansible-automation-platform-26 | lightspeed-chatbot-rhel9 | — | — |
| ansible-automation-platform-26 | platform-resource-runner-rhel9 | — | — |
| ansible-automation-platform-27 | controller-rhel9 | — | — |
| ansible-automation-platform-27 | de-minimal-rhel9 | — | — |
| ansible-automation-platform-27 | de-supported-rhel9 | — | — |
| ansible-automation-platform-27 | ee-control-plane-rhel9 | — | — |
| ansible-automation-platform-27 | ee-minimal-rhel9 | — | — |
| ansible-automation-platform-27 | ee-supported-rhel9 | — | — |
| ansible-automation-platform-27 | hub-rhel9 | — | — |
| ansible-automation-platform-27 | lightspeed-chatbot-rhel9 | — | — |
| ansible-automation-platform-27 | platform-resource-runner-rhel9 | — | — |
| ansible-automation-platform-tech-preview | ee-minimal-rhel8 | — | — |
| ansible-automation-platform-tech-preview | ee-minimal-rhel9 | — | — |
CVSS provenance
nvdv4.08.2HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat8.2HIGH
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GHSA
aiohttp server lacks an initial request/header timeout
ghsa·2026-10-19
CVE-2026-111064 [HIGH] CWE-770 aiohttp server lacks an initial request/header timeout
aiohttp server lacks an initial request/header timeout
### Summary
The keepalive timeout was not used during the initial portion of a request.
### Impact
An attacker could keep an idle connection open indefinitely before sending any data.
### Workaround
Use a reverse proxy (as recommended for all production deployments) with sensible keepalive limits.
Red Hat
aiohttp: aiohttp: Denial of Service via missing initial request timeout
vendor_redhat·2026-10-19·CVSS 8.2
CVE-2026-111064 [HIGH] CWE-772 aiohttp: aiohttp: Denial of Service via missing initial request timeout
aiohttp: aiohttp: Denial of Service via missing initial request timeout
A flaw was found in aiohttp. The server does not enforce a timeout during the initial phase of a request before any data is received. A remote attacker can exploit this vulnerability by keeping idle connections open indefinitely, exhausting available connection capacity and resulting in a Denial of Service (DoS).
Package: exploit-intelligence/vulnerability-analysis-rhel9 (Exploit Intelligence) - Affected
Package: lightspeed-core/lightspeed-stack-rhel9 (Lightspeed Core) - Affected
Package: lightspeed-core/rag-tool-cpu-rhel9 (Lightspeed Core) - Affected
Package: lightspeed-core/rag-tool-cuda-12.9-rhel9 (Lightspeed Core) - Affected
Package: mta/mta-solution-server-rhel9 (Migration Toolkit for Applications 8) - Affec
No detection rules found.
No public exploits indexed.
2026-10-19
Published