AIOHTTP: CRLF injection in multipart headers_CVE-2026-50269

2.7 / 10

LOW

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

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.0, attacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar. In the unlikely situation that an application is passing user-controlled strings into MultipartWriter.append(headers=...) or Payload.headers, then an attacker may be able to modify the request to inject headers or change the contents of the request. This vulnerability is fixed in 3.14.0.

Basic Information

ID CVE-2026-50269

Source GitHub_M

Published Jun 22, 2026 at 16:30

Affected Product

Vendor aio-libs

Product aiohttp

Version < 3.14.0

Affected Versions aio-libs aiohttp < 3.14.0

CWE Classification

CWE-93 CWE-113

References

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    "published": "2026-06-22T16:30:55.789Z",
    "modified": "2026-06-22T16:30:55.789Z",
    "type": "cve",
    "title": "AIOHTTP: CRLF injection in multipart headers",
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