CVE-2026-44290
High
Description
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs allowed certain schema option paths to traverse through inherited object properties while applying options. A crafted protobuf schema or JSON descriptor could cause option handling to write to properties on global JavaScript constructors, corrupting process-wide built-in functionality. This vulnerability is fixed in 7.5.6 and 8.0.2.
SeverityHigh
CVSS7.5
Exploit probability—
ProductProtobufjs
PublishedMay 13, 2026
First seenMay 13, 2026
Weakness typeCWE-1321Prototype pollution
How to fix
Update
- protobufjs_project protobufjs7.5.6, 8.0.2 or later
- protobufjs7.5.6, 8.0.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| protobufjs_project protobufjs | v < 7.5.6, 8.0.0 ≤ v < 8.0.2 | 7.5.6, 8.0.2 |
| protobufjsnpm | v < 7.5.6, 8.0.0 ≤ v < 8.0.2 | 7.5.6, 8.0.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.