medium5.3
CVE-2026-45740
protobufjs: Denial of Service via unbounded recursive JSON descriptor expansion
Impact
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.8 and 8.2.0, protobufjs could recurse without a depth limit while expanding nested JSON descriptors through Root.fromJSON() and Namespace.addJSON(). A crafted JSON descriptor with deeply nested namespace definitions could cause the JavaScript call stack to be exhausted during descriptor loading. This vulnerability is fixed in 7.5.8 and 8.2.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | protobufjs | <= 7.5.7 | 7.5.8 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Protobufjs Project | Protobufjs | before 7.5.8 from 8.0.0 before 8.2.0 |