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CVE-2026-50269

2.7 low SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 2.7 · aiohttpNVD modified 2026-10-25 23:10

Affected (CPE criteria) 1

  • cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*

References 2