CVE-2026-111064: aio-libs aiohttp
CVSS: 8.2v4.0HighAwaiting analysis
AliasesGHSA-5wr8-gcqf-gqf3
Published 19-10-2026Last modified 19-10-2026
Vulnerability summary
CVE-2026-111064 is a high (CVSS 8.2) vulnerability in aio-libs aiohttp.
CVSS score
8.2/10
010
High · v4.0 (CVE.org)EPSS score
Not scored
0%100%
No EPSS score yetKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 19-10-2026PublishedVulnerability first disclosed.
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.
CVSS metrics
3 scores · 3 sources · 1 versionHigh 8.2Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NSourcesAll 3 agree
- NVDNIST8.2HighCVSS: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
- OSV · PypiEcosystem advisory · calculated8.2HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS trend
No EPSS score has been published for this record yet.
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Aio-libs1 product
- aiohttp< 3.14.4
PyPI1 product
- aiohttp< 3.14.4
2 vendors · 2 products
References
4 links- github.com/aio-libs/aiohttpPACKAGE