Vulnerability · Published May 13, 2026 · Assigned by GitHub_M
CVE-2026-44294protobufjs: Denial of service from crafted field names in generated code
Medium 5.3
In plain English
A medium-severity improper input validation in protobuf.js from protobufjs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript property accessors from schema-controlled field and oneof names. Certain control characters in field names were not escaped before being embedded into generated function bodies. A crafted schema or JSON descriptor could therefore cause generated encode, decode, verify, or conversion functions to fail during compilation. This vulnerability is fixed in 7.5.6 and 8.0.2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | protobufjs | 7.5.6 | GHSA-2pr8-phx7-x9h3 |
| npm | protobufjs | 8.0.2 | GHSA-2pr8-phx7-x9h3 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| protobufjs | protobuf.js | < 7.5.6>= 8.0.0, < 8.0.2 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L