CVE-2026-50269
LOW EPSS 21.8%
Published Jun 22, 20261w ago · Modified Jun 22, 20261w ago
2.7 CVSS 4.0
Published Jun 22, 2026 1w ago
Last Modified Jun 22, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
21.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 2
CWE-113
CWE-93
References 2
- github.com https://github.com/aio-libs/aiohttp/commit/bf88077ebb14f4c29924b8e8904cba20c55c28b8
- github.com https://github.com/aio-libs/aiohttp/security/advisories/GHSA-m6qw-4cw2-hm4m
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.