CVEvulnerability
CVE-2026-59877
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-08
- Last modified
- 2026-10-25
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-835
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.
Affected configurations
• protobufjs project protobufjs (< 7.6.5)
• protobufjs project protobufjs (>= 8.0.0 < 8.6.6)
Related
Weakness · CWE (1)
- CWE-835 Loop with Unreachable Exit Condition weakness
References
- https://github.com/protobufjs/protobuf.js/commit/10fba6d54815ceecca8a06b9a6db490c8f5d2217 Patch
- https://github.com/protobufjs/protobuf.js/commit/fa5c73add738ceb471e74da8cc2f3727c3d0a69f Patch
- https://github.com/protobufjs/protobuf.js/pull/2352 Issue Tracking, Patch
- https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v7.6.5 Product, Release Notes
- https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.6.6 Product, Release Notes
- https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-j3f2-48v5-ccww Mitigation, Vendor Advisory