CVE-2026-34519

| EUVD-2026-18044 LOW
2026-04-01 GitHub_M GHSA-mwh4-6h8g-pg8w
2.7
CVSS 4.0

CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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-2026-18044
CVE Published
Apr 01, 2026 - 20:26 nvd
LOW 2.7

Tags

Python Code Injection

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an attacker who controls the reason parameter when creating a Response may be able to inject extra headers or similar exploits. This issue has been patched in version 3.13.4.

Analysis

Header injection in AIOHTTP prior to version 3.13.4 allows remote attackers to inject arbitrary HTTP headers or conduct similar exploits by controlling the reason parameter when creating a Response object. The vulnerability has low real-world impact (CVSS 2.7, EPSS not available) and requires the attacker to control application-level input that directly influences the reason parameter; no public exploit code or active exploitation has been identified. …

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Priority Score

14
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +14
POC: 0

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CVE-2026-34519 vulnerability details – vuln.today
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