← Vulnerability feed

Vulnerability record · CVE-2026-54271 · published 22 June 2026

CVE-2026-54271: Protobufjs project protobufjs-cli code injection vulnerability

PProtobufjs Project · Protobufjs Cli

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.

8.2 CVSS 3.1 High EPSS 0.30% · top 79.3% CWE-94 · Code injection
8.2CVSS 3.1 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
24 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-pr59-h9ph-3fr8 MitigationVendor Advisory

Track CVE-2026-54271 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2026-44295Protobufjs project protobufjs-cli code injection vulnerabilityprotobufjs-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 identif…EPSS 0.36%7.8CVE-2026-42290Protobufjs project protobufjs-cli os command injection vulnerabilityprotobufjs-cli is the command line add-on for protobuf.js. Prior to 1.2.1 and 2.0.2, pbts invoked JSDoc by building a shell command string from input…EPSS 0.19%5.3CVE-2026-54269Protobufjs project protobufjs vulnerabilityprotobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 8.6.0 and 7.6.3, protobufjs accepted certain schema-derived names t…EPSS 0.40%8.8CVE-2026-65660Microsoft sharepoint server code injection vulnerabilityImproper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.KEVEPSS 2.1%9.8CVE-2026-60004Gitea diffpatch API code injection enables remote code executionGitea before 1.27.1 allows remote code execution through the diffpatch API by way of Git hook installation. The flaw is a code injection issue (CWE-9…KEVEPSS 24%analysed9.5CVE-2026-72530TrueConf Server sandbox breakout via crafted script code injectionTrueConf Server versions 5.3.X through 5.3.9, 5.4.X through 5.4.9, 5.5.X through 5.5.5 and earlier allow a remote unauthenticated attacker to break o…KEVEPSS 1.7%analysed9.4CVE-2025-62593Ray browser-based RCE via insufficient User-Agent guardRay, an AI compute engine, contains a critical remote code execution flaw before version 2.52.0. Its defense against browser-based attacks relies on …KEVEPSS 62%analysed9.8CVE-2026-9198Langflow auto_login and code validation chain enables unauthenticated RCEIBM Langflow OSS 1.0.0 through 1.10.0 exposes /api/v1/auto_login, which mints SUPERUSER tokens to any network caller, and /api/v1/validate/code, whic…KEVEPSS 29%analysed

Source: NIST National Vulnerability Database (record CVE-2026-54271), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.