AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, the server_hostname TLS SNI check can be bypassed when an existing connection is reused. If an application makes multiple requests to the same domain, but with different per-request server_hostname parameters, then the later calls may succeed by reusing the existing connection when they should have been rejected due to the TLS SNI check. This vulnerability is fixed in 3.14.1.

The version of the aiohttp Python library installed on the remote host is prior to 3.14.1. It is, therefore, affected by multiple vulnerabilities:

  - Prior to 3.14.1, no limit was present on the number of pipelined requests that could be queued. An     attacker may be able to use pipelined requests to use excessive amounts of memory, potentially leading to     DoS. (CVE-2026-54273)

  - Prior to 3.14.1, the server_hostname TLS SNI check can be bypassed when an existing connection is reused.
    If an application makes multiple requests to the same domain, but with different per-request     server_hostname parameters, then the later calls may succeed by reusing the existing connection when they     should have been rejected due to the TLS SNI check. (CVE-2026-54275)

  - Prior to 3.14.1, it is possible to bypass the max_line_size check in parts of an HTTP request in the C     parser. If using the optimised C parser (the default in pre-built wheels), then an attacker may be able to     send oversized lines through the HTTP parser and use an excessive amount of memory, potentially leading to     DoS. (CVE-2026-54277)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, the     server_hostname TLS SNI check can be bypassed when an existing connection is reused. If an application     makes multiple requests to the same domain, but with different per-request server_hostname parameters,     then the later calls may succeed by reusing the existing connection when they should have been rejected     due to the TLS SNI check. This vulnerability is fixed in 3.14.1. (CVE-2026-54275)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, the
    server_hostname TLS SNI check can be bypassed when an existing connection is reused. If an application
    makes multiple requests to the same domain, but with different per-request server_hostname parameters,
    then the later calls may succeed by reusing the existing connection when they should have been rejected
    due to the TLS SNI check. This vulnerability is fixed in 3.14.1. (CVE-2026-54275)

ID	Name	Product	Family	Severity
324958	Python Library aiohttp < 3.14.1 Multiple Vulnerabilities	Nessus	Misc.	high
322135	Linux Distros Unpatched Vulnerability : CVE-2026-54275	Nessus	Misc.	medium
443243	SCA: security update for aiohttp (GHSA-4m7w-qmgq-4wj5)	Tenable Cloud Security	SCA Checks	medium
443243	SCA: security update for aiohttp (GHSA-4m7w-qmgq-4wj5)	Tenable Self-Hosted Container Security	SCA Checks	medium

Detections

Analytics

CVE-2026-54275

medium

Tenable Plugins

high

medium

medium

medium