moleculerjs Moleculer up to 0.14.35/0.15.1 TCP Transporter parser.js Parser._write resource consumption

Summaryinfo

A vulnerability was found in moleculerjs Moleculer up to 0.14.35/0.15.1 and classified as problematic. This impacts the function Parser._write of the file src/transporters/tcp/parser.js of the component TCP Transporter. Executing a manipulation can lead to resource consumption. This vulnerability is handled as CVE-2026-97705. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in moleculerjs Moleculer up to 0.14.35/0.15.1 and classified as problematic. This vulnerability affects the function Parser._write of the file src/transporters/tcp/parser.js of the component TCP Transporter. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. CVE summarizes:

Moleculer is a progressive microservices framework for Node.js. Prior to 0.14.36 and 0.15.2, Parser._write in src/transporters/tcp/parser.js used Buffer.prototype.readInt32BE to read a signed packet length, so a remote unauthenticated peer could supply a negative value that caused packet.slice(length) to return the unchanged buffer while the while (packet.length > 0) loop continued indefinitely. The synchronous loop blocked the Node.js event loop and made every service in the process unresponsive until restart. The TCP transporter must be enabled and reachable, and neither CRC validation nor maxPacketSize prevents the malformed length value. This issue is fixed in versions 0.14.36 and 0.15.2.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-97705 since 09/24/2026. The exploitation appears to be easy. 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.

Upgrading to version 0.14.36 or 0.15.2 eliminates this vulnerability.

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Productinfo

Vendor

• moleculerjs

Name

• Moleculer

Version

• 0.14.0
• 0.14.1
• 0.14.2
• 0.14.3
• 0.14.4
• 0.14.5
• 0.14.6
• 0.14.7
• 0.14.8
• 0.14.9
• 0.14.10
• 0.14.11
• 0.14.12
• 0.14.13
• 0.14.14
• 0.14.15
• 0.14.16
• 0.14.17
• 0.14.18
• 0.14.19
• 0.14.20
• 0.14.21
• 0.14.22
• 0.14.23
• 0.14.24
• 0.14.25
• 0.14.26
• 0.14.27
• 0.14.28
• 0.14.29
• 0.14.30
• 0.14.31
• 0.14.32
• 0.14.33
• 0.14.34
• 0.14.35
• 0.15.0
• 0.15.1

Website

• Product: https://github.com/moleculerjs/moleculer/

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