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CVE-2026-44295

HighPublished

protobufjs-cli: Code injection in pbjs static output from crafted schema names

Published: May 13, 2026
Updated: May 13, 2026
Assigning CNA: GitHub_M
Evidence observed: Aug 17, 2026

Primary CVSS

8.7/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

EPSS probability estimate

0.4%

Low · next 30 days

Percentile: 33.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

protobufjs-cli is the command line add-on for protobuf.js. Prior to 1.2.1 and 2.0.2, pbjs static code generation could emit unsafe JavaScript identifiers derived from schema-controlled names. When generating static JavaScript from a crafted schema or JSON descriptor, certain namespace, enum, service, or derived full names could be written into the generated output without sufficient sanitization. This vulnerability is fixed in 1.2.1 and 2.0.2.

Sources

CVE-2026-442_PoC
CVE-2026-44289, CVE-2026-44290, CVE-2026-44291, CVE-2026-44292, CVE-2026-44294, CVE-2026-44295 - protobuf.js

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