CVE-2026-54271
8.2 · HIGHOverview
CVE-2026-54271 is a high-severity vulnerability affecting protobufjs_project protobufjs-cli. It was published on June 22, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
protobufjs-cli is the command line add-on for protobuf.js. Prior to 1.3.2 and 2.5.0, a previous fix for unsafe name handling in pbjs static / static-module code generation was incomplete. Affected versions of protobufjs-cli could still emit unsafe JavaScript references when generating static output from crafted JSON descriptor input. The common case of parsing schemas from .proto files is not affected. This is a bypass of CVE-2026-44295. An attacker who can provide or influence pre-parsed JSON descriptors passed to pbjs static code generation may be able to cause generated JavaScript output to contain attacker-controlled code. The injected code may execute if the generated file is later executed or imported and an affected generated API path is invoked. This vulnerability is fixed in 1.3.2 and 2.5.0.
Remediation
Check the references section for vendor advisories and patches from protobufjs_project. Update protobufjs-cli to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| protobufjs_project | protobufjs-cli | >= 0, < 1.3.2 | Affected |
Frequently Asked Questions
What is CVE-2026-54271?
CVE-2026-54271 is a high-severity vulnerability affecting protobufjs_project protobufjs-cli. It was published on June 22, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).
How severe is CVE-2026-54271?
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-54271?
Check the references section for vendor advisories and patches from protobufjs_project. Update protobufjs-cli to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-54271?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-54271 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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