CVE-2025-57282 Overview
CVE-2025-57282 is a command injection vulnerability affecting the ngrok npm package versions 4.3.3 and 5.0.0-beta.2. The flaw allows an authenticated attacker with low privileges to inject arbitrary operating system commands through unsanitized input passed to the underlying shell. Successful exploitation leads to arbitrary command execution on the host running the vulnerable package, with full impact on confidentiality, integrity, and availability. The weakness is classified under CWE-77: Improper Neutralization of Special Elements used in a Command.
Critical Impact
Attackers can execute arbitrary operating system commands on hosts running vulnerable ngrok versions 4.3.3 or 5.0.0-beta.2, leading to full host compromise.
Affected Products
- ngrok npm package version 4.3.3
- ngrok npm package version 5.0.0-beta.2
- Node.js applications that invoke the affected ngrok wrapper with attacker-influenced input
Discovery Timeline
- 2026-05-18 - CVE-2025-57282 published to the National Vulnerability Database (NVD)
- 2026-05-18 - Last updated in NVD database
Technical Details for CVE-2025-57282
Vulnerability Analysis
The ngrok npm package provides a Node.js wrapper around the ngrok tunneling binary. Versions 4.3.3 and 5.0.0-beta.2 pass user-controlled values to a shell context without proper neutralization of shell metacharacters. An attacker who can influence parameters consumed by the wrapper can append shell operators such as ;, &&, |, or backticks to break out of the intended command string. The injected payload runs with the privileges of the Node.js process invoking the library, which is frequently a developer workstation, build agent, or backend service exposing tunneling functionality.
The vulnerability requires network reachability to a service that exposes the affected wrapper and some level of authenticated access to invoke it. No user interaction is required to trigger the injection once a request reaches the vulnerable code path.
Root Cause
The root cause is improper neutralization of special elements used in a command [CWE-77]. The library concatenates input into a string that is later executed by a shell interpreter rather than passing arguments as a discrete array to a non-shell process spawn primitive such as child_process.execFile or spawn with shell: false. Any metacharacter in the input retains its shell meaning at execution time.
Attack Vector
Exploitation occurs over the network against applications that expose the affected ngrok wrapper to authenticated callers. An attacker submits a crafted parameter, such as a tunnel name, region, or auth token field, containing shell metacharacters followed by an arbitrary command. When the wrapper builds and executes the resulting command line, the injected payload runs on the host. A proof-of-concept demonstrating the injection pattern is published as a GitHub Gist PoC.
No verified exploit code is reproduced here. See the linked Gist for technical proof-of-concept details.
Detection Methods for CVE-2025-57282
Indicators of Compromise
- Unexpected child processes of the Node.js runtime spawning shells such as sh, bash, or cmd.exe with arguments containing ngrok substrings followed by additional commands.
- Outbound network connections from build agents or application servers to unfamiliar hosts shortly after ngrok tunnel creation requests.
- Presence of ngrok@4.3.3 or ngrok@5.0.0-beta.2 in package-lock.json, yarn.lock, or installed node_modules directories.
Detection Strategies
- Inspect application logs for ngrok API parameters containing shell metacharacters such as ;, &&, ||, |, `, or $(.
- Monitor process creation telemetry for Node.js processes that spawn interpreters or download utilities such as curl, wget, or powershell as descendants of an ngrok invocation.
- Use software composition analysis (SCA) to enumerate dependencies and flag affected versions in CI/CD pipelines.
Monitoring Recommendations
- Alert on writes to sensitive paths or credential stores by child processes of Node.js services that integrate ngrok.
- Track anomalous outbound traffic patterns from systems known to use ngrok tunnels, particularly to non-ngrok infrastructure.
- Forward process, network, and dependency-inventory telemetry to a centralized analytics platform for correlation across hosts.
How to Mitigate CVE-2025-57282
Immediate Actions Required
- Inventory all Node.js projects and container images and remove or upgrade any installation of ngrok@4.3.3 or ngrok@5.0.0-beta.2.
- Restrict who can supply parameters to any service that wraps the ngrok library, and reject inputs containing shell metacharacters at the API boundary.
- Rotate any credentials, auth tokens, or secrets that were accessible to processes running the affected versions.
Patch Information
No vendor patch metadata is included in the NVD record at the time of publication. Consult the npm package registry for the current ngrok release and upgrade to a version that postdates 5.0.0-beta.2 and does not include the affected 4.3.3 build once a fixed release is available.
Workarounds
- Pin dependencies to a non-affected ngrok release via package.json and lockfiles, and rebuild downstream container images.
- Validate and allowlist input passed to the wrapper, rejecting any value that is not strictly alphanumeric or within an expected character class.
- Where feasible, invoke the ngrok binary directly using argument arrays with child_process.spawn and shell: false instead of relying on string concatenation through the vulnerable wrapper.
# Identify and remove affected ngrok versions across a project tree
npm ls ngrok
npm uninstall ngrok
npm install ngrok@latest --save-exact
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
