Node.js up to 20.20.1/22.22.1/24.14.0/25.8.1 V8 Handler JSON.parse denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.6$0-$5k5.45-

Summaryinfo

A vulnerability was found in Node.js up to 20.20.1/22.22.1/24.14.0/25.8.1 and classified as problematic. This vulnerability affects the function JSON.parse of the component V8 Handler. Executing a manipulation can lead to denial of service. This vulnerability appears as CVE-2026-21717. 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 Node.js up to 20.20.1/22.22.1/24.14.0/25.8.1. It has been declared as problematic. This vulnerability affects the function JSON.parse of the component V8 Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The advisory is shared for download at nodejs.org. This vulnerability was named CVE-2026-21717. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 304242 (Debian dsa-6183 : libnode-dev - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 20.20.2, 22.22.2, 24.14.1 or 25.8.2 eliminates this vulnerability. The upgrade is hosted for download at nodejs.org.

The vulnerability is also documented in the databases at Tenable (304242) and EUVD (EUVD-2026-17182). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 304242
Nessus Name: Debian dsa-6183 : libnode-dev - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Node.js 20.20.2/22.22.2/24.14.1/25.8.2

Timelineinfo

03/30/2026 Advisory disclosed
03/30/2026 +0 days VulDB entry created
03/31/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: nodejs.org
Status: Confirmed

CVE: CVE-2026-21717 (🔒)
GCVE (CVE): GCVE-0-2026-21717
GCVE (VulDB): GCVE-100-354148
EUVD: 🔒

Entryinfo

Created: 03/30/2026 07:41
Updated: 03/31/2026 04:06
Changes: 03/30/2026 07:41 (54), 03/30/2026 12:37 (2), 03/31/2026 04:06 (1)
Complete: 🔍
Cache ID: 216:190:103

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