Vulnerability in Aio-libs Aiohttp

CVE-2025-69225

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 po…

Vulnerability class: HTTP Request Smuggling

EPSS: 0.000 (9.3th percentile) — read the EPSS interpretation.

Affected products

Aio-libs Aiohttp — versions < 3.13.3

Weakness classification (CWE)

CWE-444 — Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling)

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mqqc-3gqh-h2x8 (x_refsource_CONFIRM)
https://github.com/aio-libs/aiohttp/commit/c7b7a044f88c71cefda95ec75cdcfaa4792b3b96 (x_refsource_MISC)