google-protobuf contains an unbounded recursion when parsing unknown protobuf group fields. An attacker can send a small crafted payload of deeply nested START_GROUP wire bytes to any Node.js service that calls the generated deserializeBinary() API, causing a RangeError: Maximum call stack size exceeded and crashing the process. No authentication or prior knowledge of the schema is required.
History

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google protobuf-javascript
Vendors & Products Google
Google protobuf-javascript

Fri, 18 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-606
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


Thu, 17 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 17 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Description google-protobuf contains an unbounded recursion when parsing unknown protobuf group fields. An attacker can send a small crafted payload of deeply nested START_GROUP wire bytes to any Node.js service that calls the generated deserializeBinary() API, causing a RangeError: Maximum call stack size exceeded and crashing the process. No authentication or prior knowledge of the schema is required.
Title Uncontrolled Recursion leading to Denial of Service in protobuf-javascript (google-protobuf)
Weaknesses CWE-674
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Google

Published: 2026-09-17T13:27:30.163Z

Updated: 2026-09-17T19:38:55.924Z

Reserved: 2026-09-11T18:09:56.712Z

Link: CVE-2026-89418

cve-icon Vulnrichment

Updated: 2026-09-17T19:38:43.184Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-17T14:17:52.157

Modified: 2026-09-18T13:45:29.270

Link: CVE-2026-89418

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-17T13:27:30Z

Links: CVE-2026-89418 - Bugzilla