CVE-2026-44294: Protobufjs Project Protobufjs

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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 products

• Protobufjs Project Protobufjs: before 7.5.6 (fixed in 7.5.6); from 8.0.0, before 8.0.2 (fixed in 8.0.2)

Published 2026-05-13. Last modified 2026-06-17.