Node.js up to 22.23.3/24.22.0/26.12.0 HTTP Agent improper synchronization

Summaryinfo

A vulnerability, which was classified as critical, has been found in Node.js up to 22.23.3/24.22.0/26.12.0. The impacted element is an unknown function of the component HTTP Agent. The manipulation leads to improper synchronization. This vulnerability is listed as CVE-2026-105481. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Node.js up to 22.23.3/24.22.0/26.12.0 and classified as critical. This issue affects an unknown functionality of the component HTTP Agent. The manipulation with an unknown input leads to a improper synchronization vulnerability. Using CWE to declare the problem leads to CWE-662. The product utilizes multiple threads or processes to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A flaw in Node.js HTTP Agent connection reuse can cause a client to accept as valid a response that was sent before the client has sent the request. This is an incomplete fix of CVE-2026-48931. The guard that destroys idle keep-alive sockets when unexpected data arrives only runs when the event loop polls for I/O. If an unsolicited response has already reached the socket but has not been read yet when the socket is handed to a new request, for example because the event loop was busy with synchronous work, the guard is removed without seeing it and the data is parsed as the response to the new request. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

The advisory is shared at nodejs.org. The identification of this vulnerability is CVE-2026-105481 since 10/05/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/23/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• JavaScript Library

Name

• Node.js

Version

• 22.23.0
• 22.23.1
• 22.23.2
• 22.23.3
• 24.0
• 24.1
• 24.2
• 24.3
• 24.4
• 24.5
• 24.6
• 24.7
• 24.8
• 24.9
• 24.10
• 24.11
• 24.12
• 24.13
• 24.14
• 24.15
• 24.16
• 24.17
• 24.18
• 24.19
• 24.20
• 24.21
• 24.22.0
• 26.0
• 26.1
• 26.2
• 26.3
• 26.4
• 26.5
• 26.6
• 26.7
• 26.8
• 26.9
• 26.10
• 26.11
• 26.12.0

License

• open-source

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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