CVE-2026-47141

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM exposes some process-wide observability builtins when they are allowed through require.builtin. The diagnosticschannel, asynchooks, and perfhooks builtins are not blocked by the dangerous builtin denylist. These modules...

CVE-2026-47141

CVE-2026-47141 affects vm2 NodeVM where diagnostics_channel, async_hooks, and perf_hooks observability builtins were exposed to sandboxed code before patching in vm2 3.11.4. These process‑wide modules can leak host data (e.g., HTTP headers, AsyncResource state, performance entries) into the sandb...

CVE-2026-47141 vm2: NodeVM observability builtins leak host process and HTTP request data

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM exposes some process-wide observability builtins when they are allowed through require.builtin. The diagnosticschannel, asynchooks, and perfhooks builtins are not blocked by the dangerous builtin denylist. These modules...

CVE-2026-47139 vm2: NodeVM network builtin exclusions bypass via internal _http_client and _http_server

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM supports excluding public network builtins from the wildcard builtin option. With this configuration direct access to http, https, http2, net, dgram, tls, dns, and dns/promises is blocked. However, Node.js also exposes...

CVE-2026-47139

vm2 NodeVM burlon bypass vulnerability exists where public network modules are blocked but internal underscored HTTP builtins (_http_client, _http_server) remain reachable. The issue allows sandboxed code to perform outbound HTTP requests and open listening sockets despite network exclusions, ena...

CVE-2026-46442

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When...

NodeVM network builtin exclusions bypass via internal _http_client and _http_server

Summary NodeVM supports excluding public network builtins from the wildcard builtin option. With this configuration direct access to http, https, http2, net, dgram, tls, dns, and dns/promises is blocked. However, Node.js also exposes underscored internal HTTP builtins such as httpclient and...

Protection Mechanism Failure

Overview org.webjars.npm:vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules. Affected versions of this package are vulnerable to Protection Mechanism Failure through the NodeVM builtin wildcard expansion in lib/builtin.js. An attacker can load Node’s private...

Improper Control of Dynamically-Managed Code Resources

Overview vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules. Affected versions of this package are vulnerable to Improper Control of Dynamically-Managed Code Resources through the NodeVM constructor in lib/nodevm.js. An attacker can obtain host code execution by...

GHSA-M4WX-M65X-GHRR vm2 has a CVE-2023-37903 patch bypass: nesting:true without explicit require still allows full RCE

Summary The fix for GHSA-8hg8-63c5-gwmx CVE-2023-37903 introduced a check in nodevm.js line 263 that blocks the combination nesting: true + require: false. However, the check uses strict equality options.require === false, which is trivially bypassed by omitting the require option entirely. When...

vm2 has a CVE-2023-37903 patch bypass: nesting:true without explicit require still allows full RCE

Summary The fix for GHSA-8hg8-63c5-gwmx CVE-2023-37903 introduced a check in nodevm.js line 263 that blocks the combination nesting: true + require: false. However, the check uses strict equality options.require === false, which is trivially bypassed by omitting the require option entirely. When...

Improper Control of Dynamically-Managed Code Resources

Overview org.webjars.npm:vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules. Affected versions of this package are vulnerable to Improper Control of Dynamically-Managed Code Resources through the NodeVM constructor in lib/nodevm.js. An attacker can obtain host...

NPM: FlowiseAI: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape

NPM: FlowiseAI: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape vulnerability discovered by ? in WordPress Npm flowise versions = 3.1.1...

GHSA-9RVC-VF7M-PGM2 FlowiseAI: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape

Summary POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2BAPIKEY is not configured — the common deployment case — Flowise executes this code inside a NodeVM sandbox...

CVE-2026-43998

vm2 is an open source vm/sandbox for Node.js. In 3.10.5, NodeVM's require.root path restriction can be bypassed using filesystem symlinks, allowing sandboxed code to load modules from outside the allowed root directory in host context. Because path validation uses path.resolve which does not...

CVE-2026-43999

CVE-2026-43999 affects vm2’s NodeVM when the builtins allowlist is configured with a wildcard that includes the module builtin. Prior to version 3.11.0, the module builtin can bypass vm2’s allowlist via Module._load, because vm2 exposes the host’s Module object through a readonly proxy that still...

CVE-2026-43998 vm2: NodeVM require.root bypass via symlink traversal allows sandbox escape

vm2 is an open source vm/sandbox for Node.js. In 3.10.5, NodeVM's require.root path restriction can be bypassed using filesystem symlinks, allowing sandboxed code to load modules from outside the allowed root directory in host context. Because path validation uses path.resolve which does not...

CVE-2026-43998 vm2: NodeVM require.root bypass via symlink traversal allows sandbox escape

vm2 is an open source vm/sandbox for Node.js. In 3.10.5, NodeVM's require.root path restriction can be bypassed using filesystem symlinks, allowing sandboxed code to load modules from outside the allowed root directory in host context. Because path validation uses path.resolve which does not...

CVE-2026-43998

The CVE-2026-43998 issue affects vm2 (NodeVM) where require.root restrictions can be bypassed via filesystem symlinks. The root cause is that path.resolve() is used for validation (which does not dereference symlinks) while Node’s native require() follows symlinks, enabling sandboxed host code to...

GHSA-8HG8-63C5-GWMX vm2 NodeVM `nesting: true` bypasses `require: false` allowing sandbox escape and arbitrary OS command execution

Summary When a NodeVM is created with nesting: true, sandbox code can unconditionally require'vm2' regardless of the outer VM's require configuration — including require: false. With access to vm2, the sandbox constructs a new inner NodeVM with its own unrestricted require settings and executes...