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CVE-2026-111065— AIOHTTP: Connector pool exhaustion via Max-Age overflow

Quick assessment

Affected

aio-libs aiohttp

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

AIOHTTP 是一个基于 asyncio 和 Python 的异步 HTTP 客户端/服务器框架。在 3.14.4 版本之前，Max-Age 头部的处理可能导致整数溢出，从而跳过关闭连接的操作。攻击者可借此暂时耗尽连接池，直到垃圾回收机制释放这些连接。该问题已在 3.14.4 版本中修复。

CVSS 6.9 · Medium Updated Oct 20, 2026

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

Vendor	Product	Version Range	Status
aio-libs	aiohttp	`< 3.14.4`	affected

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Vulnerability Information

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Vulnerability Title

AIOHTTP: Connector pool exhaustion via Max-Age overflow

Source: CVE Program / CVE List V5

Vulnerability Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, Max-Age processing can overflow and skip closing a connection. An attacker can consequently exhaust the connection pool temporarily until garbage collection resolves the connections. This issue is fixed in version 3.14.4.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Source: CVE Program / CVE List V5

Vulnerability Type

不加限制或调节的资源分配

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
aio-libs	aiohttp	< 3.14.4	-

II. Public POCs for CVE-2026-111065

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-111065

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Other References for CVE-2026-111065 (3)

https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4 x_refsource_MISC
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-6cjc-53gc-5rqm x_refsource_CONFIRM
https://github.com/aio-libs/aiohttp/commit/9dd8eaf4e31f1237ef2c1574a8c82a739fca5805 x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2026-111065

Same Patch Batch · aio-libs · 2026-10-19 · 7 CVEs total

CVE-2026-111064	8.2 HIGH	aiohttp server lacks an initial request/header timeout
CVE-2026-111066	8.2 HIGH	AIOHTTP: File descriptor exhaustion in multipart requests
CVE-2026-111063	6.3 MEDIUM	AIOHTTP: Secure attribute not enforced for shared cookie
CVE-2026-111748	6.3 MEDIUM	AIOHTTP: Absolute-form request targets can spoof Request.scheme
CVE-2026-111750	6.3 MEDIUM	AIOHTTP: Pure-Python parser request smuggling
CVE-2026-111749	2.3 LOW	AIOHTTP: Cookie from subdomain can remove Host-Only Scope from existing cookies

IV. Related Vulnerabilities

Same product: aiohttp

Same vendor: aio-libs

Same weakness: CWE-770

V. Comments for CVE-2026-111065

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-111065— AIOHTTP: Connector pool exhaustion via Max-Age overflow

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 1

I. Basic Information for CVE-2026-111065

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-111065

III. Intelligence Information for CVE-2026-111065

Other References for CVE-2026-111065 (3)

Same Patch Batch · aio-libs · 2026-10-19 · 7 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-111065

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