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.
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History
Fri, 06 Nov 2026 22:00:00 +0000
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Fri, 06 Nov 2026 19:30:00 +0000
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ssvc
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Wed, 04 Nov 2026 19:30:00 +0000
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| Description | 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. | |
| Title | Moleculer: Unauthenticated Denial of Service via negative length field in the TCP transporter packet parser | |
| Weaknesses | CWE-835 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-11-04T19:28:56.273Z
Updated: 2026-11-05T19:18:45.325Z
Reserved: 2026-09-24T21:43:37.209Z
Link: CVE-2026-97705
Updated: 2026-11-05T19:18:36.334Z
Status : Awaiting Analysis
Published: 2026-11-04T20:19:13.137
Modified: 2026-11-12T22:18:35.610
Link: CVE-2026-97705
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