CVE-2026-44294

protobufjs: Denial of service from crafted field names in generated code

State: Published
Severity: 5.3 Medium
Published: May 13, 2026
Updated: May 13, 2026
Reserved: May 5, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	GitHub_M

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
protobuf.jsprotobufjs	< 7.5.6Affected >= 8.0.0, < 8.0.2Affected

References

https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-2pr8-phx7-x9h3

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