CVE-2026-16489: jsforce OS Command Injection Vulnerability

CVE-2026-16489 Overview

CVE-2026-16489 is an operating system (OS) command injection vulnerability in the jsforce JavaScript library through version 3.10.16. The flaw resides in the _execCommand function within lib/registry/sfdx.js, part of the SFDX Connection Registry component. An attacker with local access and low-level privileges can manipulate command inputs to execute arbitrary OS commands in the context of the running process. A public exploit exists, and the maintainers were notified via a GitHub issue but have not yet responded. The weakness is classified under CWE-77: Improper Neutralization of Special Elements used in a Command.

Critical Impact
Local attackers can inject arbitrary OS commands through the jsforce SFDX registry helper, leading to code execution within the host process.

Affected Products

jsforce library versions up to and including 3.10.16
lib/registry/sfdx.js component (SFDX Connection Registry)
Node.js applications embedding the vulnerable jsforce release

Discovery Timeline

2026-07-22 - CVE-2026-16489 published to NVD
2026-07-22 - Last updated in NVD database

Technical Details for CVE-2026-16489

Vulnerability Analysis

The vulnerability resides in the _execCommand helper of lib/registry/sfdx.js. This helper invokes the Salesforce CLI (sfdx) as a child process to manage connection metadata. Untrusted input flows into the command string without proper neutralization of shell metacharacters. When the input reaches the shell, embedded operators such as ;, &&, |, or backticks are interpreted, allowing an attacker to append arbitrary commands. Because jsforce is commonly used inside developer tooling and automation pipelines, injected commands run with the privileges of the invoking user.

Root Cause

The defect maps to CWE-77, improper neutralization of special elements in a command. The _execCommand function concatenates caller-controlled values into a shell invocation instead of passing arguments through a safe argv array. No allowlist or escaping is applied before the string reaches the child process spawner.

Attack Vector

Exploitation requires local access with low privileges and no user interaction. An attacker able to influence connection identifiers or registry inputs consumed by _execCommand can inject additional shell commands. A public proof of concept referenced in VulDB #380946 demonstrates the pattern. The scope remains within the invoking process, but any code executed inherits that user's file system and network permissions.

Because no verified exploit code is published in an authoritative repository, refer to the GitHub Issue #1805 tracking this defect for reproduction details.

Detection Methods for CVE-2026-16489

Indicators of Compromise

Unexpected child processes spawned by Node.js runtimes that also load the jsforce module.
Shell invocations from sfdx.js containing metacharacters such as ;, &&, |, or backticks in the command string.
Anomalous outbound network connections or file writes originating from developer workstations running jsforce-based tooling.

Detection Strategies

Inventory Node.js dependencies and flag any project resolving jsforce at version 3.10.16 or earlier using npm ls jsforce or a software composition analysis (SCA) tool.
Monitor process trees for node parents spawning shells (sh, bash, cmd.exe) that then execute non-sfdx binaries.
Correlate telemetry from CI/CD runners and developer endpoints against known Salesforce automation workflows to identify deviations.

Monitoring Recommendations

Enable command-line auditing on hosts running Salesforce integration tooling and forward events to a centralized log platform.
Alert on execution of sfdx commands containing shell separators or unexpected argument tokens.
Track modifications to project package-lock.json and yarn.lock files that pin vulnerable jsforce versions.

How to Mitigate CVE-2026-16489

Immediate Actions Required

Identify all applications, scripts, and CI/CD pipelines that depend on jsforce and confirm the resolved version.
Restrict who can invoke jsforce-based automation on shared hosts, applying the principle of least privilege to service accounts.
Remove or sandbox any workflow that passes user-controlled data into jsforce registry APIs until a patched release is available.

Patch Information

No vendor patch is available at the time of publication. According to the VulDB advisory, the project was notified through GitHub Issue #1805 but has not responded. Monitor the jsforce GitHub repository for a fixed release above 3.10.16 and update immediately once published.

Workarounds

Pin dependencies to a jsforce version only after upstream confirms a fix; in the interim, avoid calling code paths that reach _execCommand with untrusted input.
Wrap jsforce usage in a validation layer that rejects any connection identifier containing shell metacharacters (;, &, |, `, $, newline).
Execute jsforce-driven tooling inside isolated containers or dedicated build users with no interactive shell and minimal file system access.

bash

# Configuration example: validate connection names before passing to jsforce
# and run automation under a restricted account
if [[ ! "$SFDX_CONNECTION" =~ ^[A-Za-z0-9_-]+$ ]]; then
  echo "Rejecting connection name with unsafe characters" >&2
  exit 1
fi
sudo -u sfdx-runner --shell=/usr/sbin/nologin node ./run-jsforce-task.js