CVE-2026-34518

| EUVD-2026-18042 LOW
2026-04-01 GitHub_M GHSA-966j-vmvw-g2g9
2.7
CVSS 4.0

CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/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-2026-18042
CVE Published
Apr 01, 2026 - 20:15 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, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4.

Analysis

AIOHTTP prior to version 3.13.4 leaks sensitive authentication credentials across origin boundaries during HTTP redirects by failing to drop Cookie and Proxy-Authorization headers while inconsistently removing the Authorization header. This information disclosure vulnerability affects all Python applications using vulnerable AIOHTTP versions when following cross-origin redirects, potentially exposing session tokens and proxy credentials to untrusted origins. …

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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-2026-34518 vulnerability details – vuln.today
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