CVE-2026-48712: Protobufjs Project Protobufjs

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.6.1 and 8.4.1, protobufjs could recurse without a depth limit while converting decoded messages to plain objects or JSON. This affected generated toObject() conversion and the custom google.protobuf.Any JSON conversion path. A crafted protobuf binary payload containing deeply nested Any values could cause the JavaScript call stack to be exhausted during conversion to JSON. This vulnerability is fixed in 7.6.1 and 8.4.1.

Affected products

• Protobufjs Project Protobufjs: before 7.6.1 (fixed in 7.6.1); from 8.0.0, before 8.4.1 (fixed in 8.4.1)

Published 2026-06-22. Last modified 2026-06-26.