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VULNERABILITIES

CVE-2025-53643 Details

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.12.14, the Python parser is vulnerable to a request smuggling vulnerability due to not parsing trailer sections of an HTTP request. If a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or AIOHTTP_NO_EXTENSIONS is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. Version 3.12.14 contains a patch for this issue.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/aio-libs/aiohttp/commit/e8d774f635dc6d1cd3174d0e38891da5de0e2b6a [email protected]Patch
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-9548-qrrj-x5pj [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')[email protected]

Affected Products

ProductVersions
aiohttp aiohttp
< 3.12.14

CPE

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

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2025-53643
NVD Published Date:
Jul 14, 2025
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]