HTTP Request Smuggling Affecting aiohttp package, versions [,3.13.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published6 Jan 2026
- disclosed5 Jan 2026
- creditThomas
Introduced: 5 Jan 2026
CVE-2025-69225 (opens in a new tab)How to fix?
Upgrade aiohttp to version 3.13.3 or higher.
Overview
Affected versions of this package are vulnerable to HTTP Request Smuggling via the parsing of Range headers. An attacker can potentially interfere with HTTP request processing by supplying non-ASCII decimals in the header, which may lead to unexpected parser mismatches.