Inconsistent interpretation of HTTP requests in aiohttp - CVE-2025-69225
Published: January 6, 2026
Vulnerability identifier: #VU120993
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-69225
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: aio-libs
Affected software:
aiohttp
aiohttp
Detailed vulnerability description
The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.
The vulnerability exists due to the application allows non-ASCII decimals to be present in the Range header. A remote attacker can send a specially crafted HTTP request to the server and potentially smuggle arbitrary HTTP headers.
How to mitigate CVE-2025-69225
Install updates from vendor's website.