Answer in brief
CVE-2026-69243 records a Medium severity (CVSS 6.3) vulnerability in AIOHTTP: HTTP request smuggling via WebSocket upgrade. The current sources do not mark it as known exploited. The current feed maps aio-libs/aiohttp (generic), aiohttp (pip), aiohttp (pypi). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps aio-libs/aiohttp (generic), aiohttp (pip), aiohttp (pypi). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| aio-libs/aiohttpgeneric | < 3.14.2 | Not reported |
| aiohttppip | <=3.14.1 | 3.14.2 |
| aiohttppypi | >=0 <3.14.2 | 3.14.2 |
Published upstream
Aug 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 3, 2026
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades. If using the server-side component, an attacker may be able to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. A WebSocket upgrade request with a body could cause the parser to switch protocols before the complete request body was received, leaving trailing bytes to be handled as upgraded-protocol or pipelined data rather than normal HTTP body data. This issue is fixed in version 3.14.2.
Quoted source text, attributed separately from HOL analysis.