CVE-2026-34525
MEDIUM WAF: Medium
CVSS 5.3
Published: 2026-04-01
CWE-20
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, multiple Host headers were allowed in aiohttp. This issue has been patched in version 3.13.4.
WAF Coverage Analysis
Improper Input Validation
Medium WAF Coverage
OWASP: A03:2021 Injection
920xxx - Protocol Enforcement 941xxx - XSS / XXE 942xxx - SQL Injection
Affected Software
| Vendor | Product | Version |
|---|---|---|
| aiohttp | aiohttp | up to 3.13.4 |
References
- github.com (Patch)
- github.com (Patch)
- github.com (Release Notes)
- github.com (Patch, Vendor Advisory)