EUVD-2026-18046

| CVE-2026-34520 LOW
2026-04-01 GitHub_M GHSA-63hf-3vf5-4wqf
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-2026-18046
CVE Published
Apr 01, 2026 - 20:27 nvd
LOW 2.7

Tags

Python Information Disclosure

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, the C parser (the default for most installs) accepted null bytes and control characters in response headers. This issue has been patched in version 3.13.4.

Analysis

AIOHTTP's C parser accepts null bytes and control characters in HTTP response headers prior to version 3.13.4, allowing remote attackers to inject malformed headers that bypass validation and cause information disclosure. This vulnerability affects all versions before 3.13.4 and has been patched upstream; exploitation requires no authentication or user interaction but results in limited integrity impact to response headers rather than confidentiality breach.

Sign in for full analysis, threat intelligence, and remediation guidance.

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Sign in - Free

Priority Score

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

Share

EUVD-2026-18046 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy