CVE-2026-34516

| EUVD-2026-18040 MEDIUM
2026-04-01 GitHub_M GHSA-m5qp-6w8w-w647
6.6
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
Patch Released
Apr 02, 2026 - 02:30 nvd
Patch available
Analysis Generated
Apr 01, 2026 - 21:00 vuln.today
EUVD ID Assigned
Apr 01, 2026 - 21:00 euvd
EUVD-2026-18040
CVE Published
Apr 01, 2026 - 20:13 nvd
MEDIUM 6.6

Tags

Python Denial Of Service

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched in version 3.13.4.

Analysis

Memory exhaustion vulnerability in AIOHTTP prior to version 3.13.4 allows unauthenticated remote attackers to trigger denial of service via specially crafted HTTP responses containing excessive multipart headers. The vulnerability exploits insufficient memory limits during multipart header parsing, causing the server or client to consume more memory than intended. …

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Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +33
POC: 0

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CVE-2026-34516 vulnerability details – vuln.today
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