CVE-2025-69225: low-severity vulnerability in aio-libs aiohttp
AIOHTTP Regex Mismatch Allows Unicode in ASCII-Only Protocol Fields
Published · Updated
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 2.7epss 0.3%
exploitation probability
0.3%top 81% of all CVEs
observed exploitation
nono source reports it
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below contain parser logic which allows non-ASCII decimals to be present in the Range header. There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability. This issue is fixed in version 3.13.3.
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
Affected products
aio-libs · aiohttpRelated CVEs — aio-libs aiohttp
In the same product, most dangerous first.
CVE-2024-23334MEDIUMaiohttp.web.static(follow_symlinks=True) is vulnerable to directory traversalEPSS 76.9%CVE-2021-21330LOWOpen redirect vulnerability in aiohttpEPSS 1.9%CVE-2023-37276MEDIUMaiohttp vulnerable to HTTP request smugglingEPSS 1.3%CVE-2024-30251HIGHDenial of service when trying to parse malformed POST requests in aiohttpEPSS 1.1%CVE-2024-23829MEDIUMaiohttp's HTTP parser (the python one, not llhttp) still overly lenient about separatorsEPSS 1.0%CVE-2023-49082MEDIUMaiohttp's ClientSession is vulnerable to CRLF injection via methodEPSS 0.9%