aio-libs aiohttp up to 3.14.3 input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.39

Summaryinfo

A vulnerability was found in aio-libs aiohttp up to 3.14.3 and classified as critical. This affects an unknown part. Such manipulation leads to input validation. This vulnerability is listed as CVE-2026-111748. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in aio-libs aiohttp up to 3.14.3. It has been rated as critical. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, an attacker can send an absolute-form request that causes Request.scheme to use attacker-controlled request-target scheme data instead of the connection protocol. Applications that use Request.scheme for security decisions can consequently be tricked into treating an unencrypted connection as encrypted or an encrypted connection as unencrypted. This issue is fixed in version 3.14.4.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-111748 since 10/16/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 367858 (Linux Distros Unpatched Vulnerability : CVE-2026-111748), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.14.4 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (367858) and EUVD (EUVD-2026-104484). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 367858
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-111748

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: aiohttp 3.14.4

Timelineinfo

10/16/2026 CVE reserved
10/19/2026 +3 days Advisory disclosed
10/19/2026 +0 days VulDB entry created
10/20/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-111748 (🔒)
GCVE (CVE): GCVE-0-2026-111748
GCVE (VulDB): GCVE-100-422468
EUVD: 🔒

Entryinfo

Created: 10/19/2026 19:28
Updated: 10/20/2026 23:19
Changes: 10/19/2026 19:28 (66), 10/20/2026 21:45 (2), 10/20/2026 23:19 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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