nodejs Node.js up to 22.23.1/24.18.0 HTTP/2 memory allocation

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in nodejs Node.js up to 22.23.1/24.18.0. It has been rated as problematic. This impacts an unknown function of the component HTTP2. This manipulation causes memory allocation. This vulnerability is registered as CVE-2026-56846. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in nodejs Node.js up to 22.23.1/24.18.0 and classified as problematic. Affected by this vulnerability is an unknown function of the component HTTP2. The manipulation with an unknown input leads to a memory allocation vulnerability. The CWE definition for the vulnerability is CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. As an impact it is known to affect availability. The summary by CVE is:

A flaw in Node.js HTTP/2 handling can cause HTTP/2 retained header blocks evade maxSessionMemory and enable remote memory exhaustion. This vulnerability affects Node.js **24.x** and **22.x**.

It is possible to read the advisory at nodejs.org. This vulnerability is known as CVE-2026-56846 since 06/23/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 335502 (SUSE SLES16 Security Update : nodejs22 (SUSE-SU-2026:23130-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 22.23.2 or 24.18.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (335502) and EUVD (EUVD-2026-52564). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory allocation
CWE: CWE-789 / CWE-400 / CWE-404
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: 335502
Nessus Name: SUSE SLES16 Security Update : nodejs22 (SUSE-SU-2026:23130-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Node.js 22.23.2/24.18.1

Timelineinfo

06/23/2026 CVE reserved
08/04/2026 +42 days Advisory disclosed
08/04/2026 +0 days VulDB entry created
08/21/2026 +17 days VulDB entry last update

Sourcesinfo

Advisory: nodejs.org
Status: Confirmed

CVE: CVE-2026-56846 (🔒)
GCVE (CVE): GCVE-0-2026-56846
GCVE (VulDB): GCVE-100-385735
EUVD: 🔒

Entryinfo

Created: 08/04/2026 03:08
Updated: 08/21/2026 10:58
Changes: 08/04/2026 03:08 (53), 08/04/2026 04:38 (1), 08/15/2026 20:05 (2), 08/21/2026 10:55 (2), 08/21/2026 10:58 (6)
Complete: 🔍
Committer: lywand
Cache ID: 216::103

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