protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.6.5 and 8.6.6, protobufjs parsed option names by advancing through schema tokens until reaching an = token without checking for end of input, so a crafted .proto schema that opens an option declaration and ends prematurely can cause parse, Root.load, or Root.loadSync to loop indefinitely. This issue is fixed in versions 7.6.5 and 8.6.6.

Project Subscriptions

Vendors Products
Protobuf Subscribe
Protobuf Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-j3f2-48v5-ccww protobufjs: Denial of Service via infinite loop in .proto option parsing
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 22 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Fri, 10 Jul 2026 09:30:00 +0000

Type Values Removed Values Added
First Time appeared Protobuf
Protobuf protobuf
Vendors & Products Protobuf
Protobuf protobuf

Wed, 08 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 08 Jul 2026 15:45:00 +0000

Type Values Removed Values Added
Description protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.6.5 and 8.6.6, protobufjs parsed option names by advancing through schema tokens until reaching an = token without checking for end of input, so a crafted .proto schema that opens an option declaration and ends prematurely can cause parse, Root.load, or Root.loadSync to loop indefinitely. This issue is fixed in versions 7.6.5 and 8.6.6.
Title protobufjs: Denial of Service via infinite loop in .proto option parsing
Weaknesses CWE-835
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-07-08T15:49:27.814Z

Reserved: 2026-07-07T15:41:53.607Z

Link: CVE-2026-59877

cve-icon Vulnrichment

Updated: 2026-07-08T15:49:24.549Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Important

Publid Date: 2026-07-08T15:28:07Z

Links: CVE-2026-59877 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-07-26T17:45:17Z

Weaknesses