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154 vulnerabilities found for vm2 by patriksimek
CVE-2026-100723 (GCVE-0-2026-100723)
Vulnerability from nvd – Published: 2026-09-27 01:28 – Updated: 2026-09-27 01:28
VLAI
EPSS
VEX
Title
vm2 before 3.12.2 Memory Disclosure via zlib Buffer Pool
Summary
vm2 before 3.12.2 does not apply its Buffer backing-store ownership invariant (byteOffset === 0 and buffer.byteLength === length) to Buffers returned from host builtin modules. When an application explicitly exposes Node's zlib module through NodeVM's builtin allowlist (require: { builtin: ['zlib'] }), zlib.deflateSync can return a Buffer backed by Node's shared small-buffer pool whose .buffer is the entire pool. Untrusted guest code can construct a full-width view of that ArrayBuffer (Buffer.from(result.buffer, 0, result.buffer.byteLength)) to read and modify bytes belonging to unrelated host buffers, disclosing and corrupting host-realm memory across the sandbox boundary.
Severity
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://github.com/patriksimek/vm2/commit/4f2508a… | patch |
| https://github.com/patriksimek/vm2/commit/5214b02… | patch |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.2
(semver)
Unaffected: 3.12.2 (semver) |
Date Public
2026-09-08 00:00
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CVE-2026-100722 (GCVE-0-2026-100722)
Vulnerability from nvd – Published: 2026-09-27 01:28 – Updated: 2026-09-28 13:51
VLAI
EPSS
VEX
Title
vm2 before 3.12.2 Host Process Termination via Construct Trap
Summary
vm2 before 3.12.2 does not apply host-side Promise rejection handling in the sandbox-to-host construct trap. In BaseHandler, the apply trap calls markHostPromiseHandled() on the returned value, but the adjacent construct path returns the result of Reflect.construct without the same sanitization. If an embedder exposes a constructable host function whose constructor returns a native rejected Promise, an untrusted script executed via VM.run can invoke it with `new` and ignore the result; the rejected host Promise crosses the bridge unhandled and, under Node's strict unhandled-rejection policy, is promoted to an uncaught exception that terminates the host process.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 13:51 UTC
CWE
- CWE-248 - Uncaught Exception
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.2
(semver)
Unaffected: 3.12.2 (semver) |
Date Public
2026-09-08 00:00
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CVE-2026-100721 (GCVE-0-2026-100721)
Vulnerability from nvd – Published: 2026-09-27 01:28 – Updated: 2026-09-28 16:51
VLAI
EPSS
VEX
Title
vm2 before 3.12.2 Authorization Bypass via Custom Resolver
Summary
vm2 before 3.12.2 contains an authorization bypass in the NodeVM external-module resolver. When an embedder configures `require.external` with a custom resolver (and `context: 'host'`), `LegacyResolver.customResolve` in lib/resolver-compat.js records the resolved module directory in `this.externals` as `new RegExp('^' + escapeRegExp(resolvedPath))`, without requiring a path separator or end-of-string boundary. Untrusted guest code can therefore require the allowlisted module (e.g. `foo`) and then require the absolute path of a non-allowlisted sibling whose path merely shares the resolved prefix (e.g. `.../node_modules/foo2/index.js`); the sibling passes `isPathAllowedForModule` and is loaded through `hostRequire`, so its top-level code runs in the host process before the exports are wrapped with `vm.readonly`, resulting in a sandbox escape and arbitrary code execution in the host context.
Severity
9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 16:50 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://github.com/patriksimek/vm2/commit/6ac3916… | patch |
| https://github.com/patriksimek/vm2/commit/ab4ee7d… | patch |
| https://github.com/patriksimek/vm2/commit/9103446… | patch |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.2
(semver)
Unaffected: 3.12.2 (semver) |
Date Public
2026-09-08 00:00
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CVE-2026-93606 (GCVE-0-2026-93606)
Vulnerability from nvd – Published: 2026-09-18 13:20 – Updated: 2026-09-18 17:48
VLAI
EPSS
VEX
Title
vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species
Summary
vm2 (npm) versions 3.12.0 and earlier contain a sandbox escape in `VM` and `NodeVM`. When an embedder exposes a host API that returns a host-realm Promise, the bridge's rejection sanitizer (hostPromiseSanitizeReject / makeSanitizedPromiseCallback / normalizeHostPromiseCallbacks in lib/bridge.js) only wraps `then`/`catch` rejection slots that hold a function, and the sandbox-side `Symbol.species`/`.then` neutralization is installed only on the sandbox intrinsic `Promise.prototype`, so it never applies to a host Promise. Code running inside the sandbox can overwrite `p.constructor[Symbol.species]` on the host Promise and then call `p.then()` with no `onRejected` handler; V8 substitutes its internal Thrower, which re-throws the raw host rejection value into a resolve/reject closure captured by the attacker. This delivers an unsanitized, fully functional bridge proxy of the host object to sandboxed code, bypassing handleException and hostPromiseSanitizeReject. If the rejection value is host-pivotable (for example a host `process` object), this results in arbitrary code execution on the host. Fixed in 3.12.1.
Severity
10 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 17:48 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.1
(semver)
Unaffected: 3.12.1 (semver) cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* |
Date Public
2026-09-03 00:00
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CVE-2026-93605 (GCVE-0-2026-93605)
Vulnerability from nvd – Published: 2026-09-18 13:20 – Updated: 2026-09-21 20:51
VLAI
EPSS
VEX
Title
vm2 NodeVM before 3.12.1 Remote Code Execution via child_process
Summary
vm2 NodeVM versions before 3.12.1 contain a sandbox escape vulnerability where the DANGEROUS_BUILTINS denylist omits child_process despite blocking other host-spawning modules. Attackers can require child_process and execute arbitrary commands on the host system when NodeVM is configured with builtin:['*'] or explicit child_process allowance.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 17:57 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-nodevm-b… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.1
(semver)
Unaffected: 3.12.1 (semver) cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* |
Date Public
2026-09-03 00:00
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CVE-2026-93604 (GCVE-0-2026-93604)
Vulnerability from nvd – Published: 2026-09-18 13:20 – Updated: 2026-09-18 13:55
VLAI
EPSS
VEX
Title
vm2 3.11.8 Sandbox Escape via crypto.setFips
Summary
vm2 through 3.12.0 exposes Node.js's crypto.setFips() function to untrusted guest code when an embedder explicitly allowlists the crypto builtin for a NodeVM (require.builtin: ['crypto']). The builtin sanitizer (sanitizeCryptoModule in lib/builtin.js) replaces crypto.setEngine but leaves crypto.setFips callable, and the readonly wrapper used to expose the host module does not localize side effects of forwarded host functions. Guest code can therefore call crypto.setFips() to change the FIPS mode of the entire host process; the modified mode is subsequently observed by trusted host code (crypto.getFips() changed from 0 to 1 in the reported test), crossing the NodeVM isolation boundary. Fixed in vm2 3.12.1.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 13:54 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-3.11.8-s… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.1
(semver)
Unaffected: 3.12.1 (semver) cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* |
Date Public
2026-09-03 00:00
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CVE-2026-93603 (GCVE-0-2026-93603)
Vulnerability from nvd – Published: 2026-09-18 13:20 – Updated: 2026-09-22 14:25
VLAI
EPSS
VEX
Title
vm2 before 3.12.1 Sandbox Escape RCE via Non-Strict Host Function
Summary
vm2 through 3.12.0 (fixed in 3.12.1) does not correctly handle a nullish `this` receiver in the apply trap of its bridge (lib/bridge.js): when sandboxed code calls a host-provided non-strict (sloppy-mode) function without a receiver — e.g. `fn()`, a detached method, `fn.call()`, `fn.apply(undefined)`, `Reflect.apply(fn, undefined, [])`, or `fn.bind()()` — the undefined receiver is passed straight through to the host call, and V8 substitutes the host realm's global object for `this`. vm2 then wraps and returns that object to the sandbox, giving sandboxed script a live proxy of the host global. This allows a complete sandbox escape: untrusted script can reach `process` and execute arbitrary code/commands on the host (for example via `process.getBuiltinModule('child_process').execSync`). Exploitation requires that the embedding application expose at least one non-strict host function to the sandbox; strict-mode and ES module host functions are not affected.
Severity
10 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 14:25 UTC
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.1
(semver)
Unaffected: 3.12.1 (semver) cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* |
Date Public
2026-09-03 00:00
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CVE-2026-92963 (GCVE-0-2026-92963)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-18 19:15
VLAI
EPSS
VEX
Title
vm2 before 3.11.2 Information Disclosure via Internal State
Summary
vm2 versions before 3.11.2 fail to properly restrict access to the VM2_INTERNAL_STATE_DO_NOT_USE_OR_PROGRAM_WILL_FAIL global variable. Attackers can access this internal state object through globalThis to retrieve sensitive sandbox internals.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 19:15 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.11.2
(semver)
Unaffected: 3.11.2 (semver) |
Date Public
2026-05-03 00:00
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CVE-2026-92962 (GCVE-0-2026-92962)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-17 15:40
VLAI
EPSS
VEX
Title
vm2 before 3.11.4 Defense Invariant Violation via setup-sandbox.js
Summary
vm2 is a sandbox for running untrusted JavaScript. In vm2 versions up to and including 3.11.3, the defaultSandboxPrepareStackTrace function in lib/setup-sandbox.js builds its output array using prototype-walking index assignment (lines[lines.length] = value) rather than a prototype-bypassing define-property primitive. Because this bridge-internal array is allocated in the sandbox realm, code inside the sandbox can install an accessor on Array.prototype for the relevant index; the accessor is then invoked whenever the sandbox reads error.stack (or otherwise triggers Error.prepareStackTrace), allowing sandbox code to observe and intercept each stack-trace line written by the bridge. The same pattern is used in the error-handling (catch) branch. The values written are formatted strings only, so the practical impact is limited to an information side channel and a violation of vm2's bridge-container defense invariant rather than a sandbox escape; the vendor rates the issue Low. The issue is fixed in vm2 3.11.4, which installs each entry as an own data property via Reflect.defineProperty.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 15:39 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.11.4
(semver)
Unaffected: 3.11.4 (semver) |
Date Public
2026-05-18 00:00
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CVE-2026-92961 (GCVE-0-2026-92961)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-21 20:52
VLAI
EPSS
VEX
Title
vm2 before 3.11.6 Memory Exhaustion DoS via bufferAllocLimit Bypass
Summary
vm2 before 3.11.6 fails to enforce bufferAllocLimit on ArrayBuffer, SharedArrayBuffer, and TypedArray constructors, allowing attackers to allocate arbitrary host memory. Attackers can bypass the buffer allocation cap by using these V8 intrinsics to exhaust host process memory and trigger out-of-memory conditions.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 16:28 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.11.6
(semver)
Unaffected: 3.11.6 (semver) |
Date Public
2026-08-14 00:00
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CVE-2026-92960 (GCVE-0-2026-92960)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-17 14:22
VLAI
EPSS
VEX
Title
vm2 before 3.11.6 Process-wide State Exposure via os and dns
Summary
vm2 before 3.11.6 fails to restrict access to os and dns builtins under the builtin: ['*'] configuration, allowing sandbox code to read host process identity and network topology. Attackers can invoke dns.setServers() to hijack the host process DNS resolver globally, redirecting all subsequent host DNS queries through an attacker-controlled resolver.
Severity
10 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 14:21 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.11.6
(semver)
Unaffected: 3.11.6 (semver) |
Date Public
2026-08-14 00:00
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CVE-2026-92959 (GCVE-0-2026-92959)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-21 20:41
VLAI
EPSS
VEX
Title
vm2 before 3.11.8 allowAsync Bypass via Promise Thenable
Summary
vm2 before 3.11.8 does not fully enforce the allowAsync: false option in VM and NodeVM. While localPromise.prototype.then is replaced with a handler that throws 'Async not available', the sandbox's Promise static methods (Promise.resolve, Promise.all, Promise.race, Promise.any, and Promise.allSettled) still assimilate attacker-supplied thenables: native promise resolution performs PromiseResolveThenableJob and invokes the sandboxed code's then method in a microtask without passing through the patched then, so the async restriction is never applied. As a result, sandboxed script can schedule work that runs after VM.run() or NodeVM.run() has returned and outside the configured timeout, continuing to execute after the host believes execution is complete.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 20:41 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.11.8
(semver)
Unaffected: 3.11.8 (semver) |
Date Public
2026-08-27 00:00
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CVE-2026-92958 (GCVE-0-2026-92958)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-18 19:35
VLAI
EPSS
VEX
Title
vm2 before 3.11.7 Denylist Bypass via fs/promises
Summary
vm2 through 3.11.6 contains a builtin-module denylist bypass in NodeVM. When the embedder uses the builtin wildcard together with negative entries (e.g. require: { builtin: ['*', '-fs', '-child_process'] }), negative entries are matched by exact module name in lib/builtin.js, so -fs removes only the builtin named fs and does not remove builtin subpaths such as fs/promises. Sandboxed code can therefore call require('fs/promises') or require('node:fs/promises') and reach the promise-based filesystem API despite fs being denied; node: prefix handling is likewise inconsistent (a -node:fs/promises entry does not block require('fs/promises')). Host file creation and writing were confirmed via fsp.writeFile(), and other fs/promises operations (cp, mkdir, rename, rm, rmdir, truncate, read operations, etc.) are also reachable. This issue is fixed in vm2 3.11.7.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 19:35 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.11.7
(semver)
Unaffected: 3.11.7 (semver) |
Date Public
2026-08-24 00:00
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CVE-2026-92957 (GCVE-0-2026-92957)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-26 13:30
VLAI
EPSS
VEX
Title
vm2 before 3.11.7 NodeVM Builtin Deny-List Bypass via node: Prefix
Summary
vm2 through 3.11.6 does not normalize `node:`-prefixed builtin specifiers when evaluating user-supplied negative (deny) entries in a NodeVM wildcard require policy. Although NodeVM strips the `node:` prefix during require() resolution, negative wildcard entries are matched by exact string comparison against the canonical builtin names, so a policy such as `new NodeVM({ require: { builtin: ['*', '-node:child_process'] } })` fails to deny the canonical `child_process` module. Sandboxed code can therefore obtain the host `child_process` builtin via `require('child_process')` or `require('node:child_process')`, gaining references to process-spawning APIs such as execSync and spawn, which is equivalent to host command-execution capability for untrusted sandbox code. Fixed in vm2 3.11.7.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 17:24 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.11.7
(semver)
Unaffected: 3.11.7 (semver) |
Date Public
2026-08-24 00:00
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CVE-2026-92956 (GCVE-0-2026-92956)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-17 19:20
VLAI
EPSS
VEX
Title
vm2 3.10.1 through 3.11.6 Sandbox Escape via WebAssembly.compileStreaming
Summary
vm2 versions 3.10.1 through 3.11.6 contain a sandbox escape reachable from a default `new VM()` sandbox when running on Node.js 26. WebAssembly.compileStreaming and WebAssembly.instantiateStreaming can produce a raw host-realm Promise that rejects with a host-realm error object; by controlling Symbol.species via Promise.prototype.finally, sandbox code receives that raw host error, walks from the host error constructor to the host Function constructor, and recovers the real host `process` object, gaining host Node.js capabilities (e.g. access to host modules such as fs) in the context of the process running the sandbox. No NodeVM, require permission, host object injection, or otherwise unsafe configuration is required. This is a bypass of the fix for GHSA-6j2x-vhqr-qr7q, which removed the JSPI entry points WebAssembly.promising and WebAssembly.Suspending. The issue is fixed in 3.11.7.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:18 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-3.10.1-t… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
3.10.1 , < 3.11.7
(semver)
Unaffected: 3.11.7 (semver) |
Date Public
2026-08-24 00:00
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CVE-2026-92955 (GCVE-0-2026-92955)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-17 14:23
VLAI
EPSS
VEX
Title
vm2 before 3.11.8 Sandbox Escape via NodeVM
Summary
vm2 before 3.11.8 contains a sandbox escape vulnerability in NodeVM that allows attackers to access the host __proto__ getter/setter through console._stdout and console._stderr. Attackers can overwrite EventEmitter.prototype.emit and trigger process events to execute code with process context, bypassing code generation restrictions.
Severity
10 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 14:23 UTC
CWE
- CWE-913 - Improper Control of Dynamically-Managed Code Resources
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.11.8
(semver)
Unaffected: 3.11.8 (semver) |
Date Public
2026-08-27 00:00
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CVE-2026-92954 (GCVE-0-2026-92954)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-26 13:30
VLAI
EPSS
VEX
Title
vm2 3.10.0 through 3.11.7 Denial of Service via Host Promise
Summary
vm2 is a sandbox library for running untrusted JavaScript in Node.js. In versions >= 3.10.0 and <= 3.11.7, Promises returned from the host realm into the sandbox are not marked as handled at the bridge boundary; only Promises created inside the sandbox are wrapped with a rejection-swallowing handler (lib/setup-sandbox.js), and the bridge only installs host-side rejection sanitizers when sandbox code calls .then/.catch/.finally. As a result, code running in the sandbox can invoke a host function that returns a rejected Promise (for example events.once() exposed via the NodeVM events builtin, or any embedder-provided Promise-returning API) and simply ignore the return value, leaving the host Promise unhandled so that Node.js's default unhandled-rejection behavior terminates the host process. This is an incomplete fix of GHSA-hw58-p9xv-2mjh. The issue is fixed in version 3.11.8.
Severity
8.6 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 17:15 UTC
CWE
- CWE-248 - Uncaught Exception
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-3.10.0-t… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
3.10.0 , < 3.11.8
(semver)
Unaffected: 3.11.8 (semver) |
Date Public
2026-08-27 00:00
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CVE-2026-92953 (GCVE-0-2026-92953)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-18 19:49
VLAI
EPSS
VEX
Title
vm2 3.11.0 through 3.11.7 Prototype Pollution via TypedArray
Summary
vm2 versions from 3.11.0 before 3.11.8 fail to protect host TypedArray and ArrayBuffer prototypes from sandbox mutation. Attackers can use prototype-walking primitives to reach and modify host Uint8Array.prototype, %TypedArray%.prototype, and ArrayBuffer.prototype, causing host-created typed arrays to observe attacker-controlled properties after VM.run() returns.
Severity
10 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 19:49 UTC
CWE
- CWE-913 - Improper Control of Dynamically-Managed Code Resources
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
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| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
3.11.0 , < 3.11.8
(semver)
Unaffected: 3.11.8 (semver) |
Date Public
2026-08-27 00:00
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CVE-2026-92952 (GCVE-0-2026-92952)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-17 15:44
VLAI
EPSS
VEX
Title
vm2 3.11.4 through 3.11.6 Sandbox Symbol Filtering Bypass
Summary
vm2 versions 3.11.4 through 3.11.6 incompletely filter Node.js registered internal symbols across the sandbox boundary. The extraction filters in lib/setup-sandbox.js and the cross-realm symbol checks and write traps in lib/bridge.js use a fixed list of known dangerous registered symbols that omits nodejs.stream.disturbed and nodejs.stream.errored, which are exposed on host WebStream prototypes on newer Node.js releases (validated on Node.js v25.8.0). When the embedder exposes a host WebStream object and the host stream/web module to the sandbox, sandbox code can obtain the real host symbols via Object.getOwnPropertySymbols(streamWeb.ReadableStream.prototype) and use them as write keys on host stream objects, corrupting host-visible stream state — for example making stream.Readable.isDisturbed() return false for an already-consumed stream. This can bypass host logic that relies on Node's public stream-state helpers to enforce one-shot body consumption, reject errored streams, or decide whether a stream is safe to hand to another component. It is not a host code-execution primitive in the reported proof of vulnerability. This is an incomplete fix for the earlier nodejs.* symbol filtering issue. Fixed in vm2 3.11.7.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 15:43 UTC
CWE
- CWE-669 - Incorrect Resource Transfer Between Spheres
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-3.11.4-t… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
3.11.4 , < 3.11.7
(semver)
Unaffected: 3.11.7 (semver) |
Date Public
2026-08-24 00:00
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CVE-2026-92951 (GCVE-0-2026-92951)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-17 19:20
VLAI
EPSS
VEX
Title
vm2 before 3.11.7 Module Allowlist Bypass via Custom Resolver
Summary
vm2 before 3.11.7 contains an incorrect authorization vulnerability in the external package allowlist check that uses non-exact substring matching instead of full package-name boundary validation. Attackers can bypass the allowlist by requiring a colliding package name that contains an allowlisted package substring, causing vm2 to load and execute unauthorized host packages in the host context.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:57 UTC
CWE
- CWE-706 - Use of Incorrectly-Resolved Name or Reference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.11.7
(semver)
Unaffected: 3.11.7 (semver) |
Date Public
2026-08-24 00:00
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CVE-2026-92950 (GCVE-0-2026-92950)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-17 14:24
VLAI
EPSS
VEX
Title
vm2 before 3.11.7 Sandbox Escape via CLI require
Summary
vm2 before 3.11.7 contains a sandbox escape vulnerability in the CLI tool that allows attackers to execute arbitrary code in the host Node.js process. Attackers can supply a malicious script file to the vm2 CLI that uses require(__filename) to re-execute itself in the host realm, bypassing sandbox isolation and accessing host modules like fs and child_process.
Severity
8.6 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 14:24 UTC
CWE
- CWE-453 - Insecure Default Variable Initialization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.11.7
(semver)
Unaffected: 3.11.7 (semver) |
Date Public
2026-08-24 00:00
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CVE-2026-92949 (GCVE-0-2026-92949)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-21 17:14
VLAI
EPSS
VEX
Title
vm2 3.9.6 before 3.11.7 Sandbox Bypass via Accessor Descriptor
Summary
vm2 versions from 3.9.6 before 3.11.7 fail to properly restrict access to accessor properties on frozen objects, allowing sandboxed scripts to bypass vm.freeze() and vm.readonly() protections. Attackers can use Object.getOwnPropertyDescriptor() or __lookupSetter__() to extract and invoke host object setters directly, mutating properties the embedder explicitly marked read-only.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 17:14 UTC
CWE
- CWE-471 - Modification of Assumed-Immutable Data (MAID)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-3.9.6-be… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
3.9.6 , < 3.11.7
(semver)
Unaffected: 3.11.7 (semver) |
Date Public
2026-08-24 00:00
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CVE-2026-92948 (GCVE-0-2026-92948)
Vulnerability from nvd – Published: 2026-09-17 13:46 – Updated: 2026-09-18 19:31
VLAI
EPSS
VEX
Title
vm2 3.9.6 through 3.11.5 Sandbox Escape via node:test
Summary
vm2 versions >= 3.9.6 and <= 3.11.6 are affected by a NodeVM builtin allowlist bypass that permits a sandbox escape on Node.js 24 and newer when the embedder explicitly allows the node:test builtin (e.g. require: { builtin: ['node:test'] }). On Node.js 24+, module.builtinModules exposes the scheme-only key node:test, which is not covered by vm2's family-based DANGEROUS_BUILTINS protection, so it is stored in the generic host-passthrough loader. Because requireImpl() in lib/setup-node-sandbox.js strips a single 'node:' prefix before the builtin lookup, sandbox code calling require('node:node:test') resolves to the stored node:test key and receives a readonly proxy to the host module. Calls to node:test.run() are forwarded to the host implementation, which spawns a separate Node process for process-isolated test execution and passes through attacker-controlled execArgv values; supplying --eval=<JavaScript> therefore executes arbitrary JavaScript in an unrestricted host Node process outside the NodeVM sandbox. Fixed in vm2 3.11.7.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 19:31 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-3.9.6-th… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
3.9.6 , < 3.11.7
(semver)
Unaffected: 3.11.7 (semver) |
Date Public
2026-08-24 00:00
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CVE-2026-100723 (GCVE-0-2026-100723)
Vulnerability from cvelistv5 – Published: 2026-09-27 01:28 – Updated: 2026-09-27 01:28
VLAI
EPSS
VEX
Title
vm2 before 3.12.2 Memory Disclosure via zlib Buffer Pool
Summary
vm2 before 3.12.2 does not apply its Buffer backing-store ownership invariant (byteOffset === 0 and buffer.byteLength === length) to Buffers returned from host builtin modules. When an application explicitly exposes Node's zlib module through NodeVM's builtin allowlist (require: { builtin: ['zlib'] }), zlib.deflateSync can return a Buffer backed by Node's shared small-buffer pool whose .buffer is the entire pool. Untrusted guest code can construct a full-width view of that ArrayBuffer (Buffer.from(result.buffer, 0, result.buffer.byteLength)) to read and modify bytes belonging to unrelated host buffers, disclosing and corrupting host-realm memory across the sandbox boundary.
Severity
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://github.com/patriksimek/vm2/commit/4f2508a… | patch |
| https://github.com/patriksimek/vm2/commit/5214b02… | patch |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.2
(semver)
Unaffected: 3.12.2 (semver) |
Date Public
2026-09-08 00:00
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CVE-2026-100722 (GCVE-0-2026-100722)
Vulnerability from cvelistv5 – Published: 2026-09-27 01:28 – Updated: 2026-09-28 13:51
VLAI
EPSS
VEX
Title
vm2 before 3.12.2 Host Process Termination via Construct Trap
Summary
vm2 before 3.12.2 does not apply host-side Promise rejection handling in the sandbox-to-host construct trap. In BaseHandler, the apply trap calls markHostPromiseHandled() on the returned value, but the adjacent construct path returns the result of Reflect.construct without the same sanitization. If an embedder exposes a constructable host function whose constructor returns a native rejected Promise, an untrusted script executed via VM.run can invoke it with `new` and ignore the result; the rejected host Promise crosses the bridge unhandled and, under Node's strict unhandled-rejection policy, is promoted to an uncaught exception that terminates the host process.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 13:51 UTC
CWE
- CWE-248 - Uncaught Exception
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.2
(semver)
Unaffected: 3.12.2 (semver) |
Date Public
2026-09-08 00:00
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CVE-2026-100721 (GCVE-0-2026-100721)
Vulnerability from cvelistv5 – Published: 2026-09-27 01:28 – Updated: 2026-09-28 16:51
VLAI
EPSS
VEX
Title
vm2 before 3.12.2 Authorization Bypass via Custom Resolver
Summary
vm2 before 3.12.2 contains an authorization bypass in the NodeVM external-module resolver. When an embedder configures `require.external` with a custom resolver (and `context: 'host'`), `LegacyResolver.customResolve` in lib/resolver-compat.js records the resolved module directory in `this.externals` as `new RegExp('^' + escapeRegExp(resolvedPath))`, without requiring a path separator or end-of-string boundary. Untrusted guest code can therefore require the allowlisted module (e.g. `foo`) and then require the absolute path of a non-allowlisted sibling whose path merely shares the resolved prefix (e.g. `.../node_modules/foo2/index.js`); the sibling passes `isPathAllowedForModule` and is loaded through `hostRequire`, so its top-level code runs in the host process before the exports are wrapped with `vm.readonly`, resulting in a sandbox escape and arbitrary code execution in the host context.
Severity
9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 16:50 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://github.com/patriksimek/vm2/commit/6ac3916… | patch |
| https://github.com/patriksimek/vm2/commit/ab4ee7d… | patch |
| https://github.com/patriksimek/vm2/commit/9103446… | patch |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.2
(semver)
Unaffected: 3.12.2 (semver) |
Date Public
2026-09-08 00:00
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CVE-2026-93606 (GCVE-0-2026-93606)
Vulnerability from cvelistv5 – Published: 2026-09-18 13:20 – Updated: 2026-09-18 17:48
VLAI
EPSS
VEX
Title
vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species
Summary
vm2 (npm) versions 3.12.0 and earlier contain a sandbox escape in `VM` and `NodeVM`. When an embedder exposes a host API that returns a host-realm Promise, the bridge's rejection sanitizer (hostPromiseSanitizeReject / makeSanitizedPromiseCallback / normalizeHostPromiseCallbacks in lib/bridge.js) only wraps `then`/`catch` rejection slots that hold a function, and the sandbox-side `Symbol.species`/`.then` neutralization is installed only on the sandbox intrinsic `Promise.prototype`, so it never applies to a host Promise. Code running inside the sandbox can overwrite `p.constructor[Symbol.species]` on the host Promise and then call `p.then()` with no `onRejected` handler; V8 substitutes its internal Thrower, which re-throws the raw host rejection value into a resolve/reject closure captured by the attacker. This delivers an unsanitized, fully functional bridge proxy of the host object to sandboxed code, bypassing handleException and hostPromiseSanitizeReject. If the rejection value is host-pivotable (for example a host `process` object), this results in arbitrary code execution on the host. Fixed in 3.12.1.
Severity
10 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 17:48 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.1
(semver)
Unaffected: 3.12.1 (semver) cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* |
Date Public
2026-09-03 00:00
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CVE-2026-93605 (GCVE-0-2026-93605)
Vulnerability from cvelistv5 – Published: 2026-09-18 13:20 – Updated: 2026-09-21 20:51
VLAI
EPSS
VEX
Title
vm2 NodeVM before 3.12.1 Remote Code Execution via child_process
Summary
vm2 NodeVM versions before 3.12.1 contain a sandbox escape vulnerability where the DANGEROUS_BUILTINS denylist omits child_process despite blocking other host-spawning modules. Attackers can require child_process and execute arbitrary commands on the host system when NodeVM is configured with builtin:['*'] or explicit child_process allowance.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 17:57 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-nodevm-b… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.1
(semver)
Unaffected: 3.12.1 (semver) cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* |
Date Public
2026-09-03 00:00
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CVE-2026-93604 (GCVE-0-2026-93604)
Vulnerability from cvelistv5 – Published: 2026-09-18 13:20 – Updated: 2026-09-18 13:55
VLAI
EPSS
VEX
Title
vm2 3.11.8 Sandbox Escape via crypto.setFips
Summary
vm2 through 3.12.0 exposes Node.js's crypto.setFips() function to untrusted guest code when an embedder explicitly allowlists the crypto builtin for a NodeVM (require.builtin: ['crypto']). The builtin sanitizer (sanitizeCryptoModule in lib/builtin.js) replaces crypto.setEngine but leaves crypto.setFips callable, and the readonly wrapper used to expose the host module does not localize side effects of forwarded host functions. Guest code can therefore call crypto.setFips() to change the FIPS mode of the entire host process; the modified mode is subsequently observed by trusted host code (crypto.getFips() changed from 0 to 1 in the reported test), crossing the NodeVM isolation boundary. Fixed in vm2 3.12.1.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 13:54 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-3.11.8-s… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.1
(semver)
Unaffected: 3.12.1 (semver) cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* |
Date Public
2026-09-03 00:00
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CVE-2026-93603 (GCVE-0-2026-93603)
Vulnerability from cvelistv5 – Published: 2026-09-18 13:20 – Updated: 2026-09-22 14:25
VLAI
EPSS
VEX
Title
vm2 before 3.12.1 Sandbox Escape RCE via Non-Strict Host Function
Summary
vm2 through 3.12.0 (fixed in 3.12.1) does not correctly handle a nullish `this` receiver in the apply trap of its bridge (lib/bridge.js): when sandboxed code calls a host-provided non-strict (sloppy-mode) function without a receiver — e.g. `fn()`, a detached method, `fn.call()`, `fn.apply(undefined)`, `Reflect.apply(fn, undefined, [])`, or `fn.bind()()` — the undefined receiver is passed straight through to the host call, and V8 substitutes the host realm's global object for `this`. vm2 then wraps and returns that object to the sandbox, giving sandboxed script a live proxy of the host global. This allows a complete sandbox escape: untrusted script can reach `process` and execute arbitrary code/commands on the host (for example via `process.getBuiltinModule('child_process').execSync`). Exploitation requires that the embedding application expose at least one non-strict host function to the sandbox; strict-mode and ES module host functions are not affected.
Severity
10 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 14:25 UTC
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
2 references
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|---|---|
| https://github.com/patriksimek/vm2/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/vm2-before-3… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| patriksimek | vm2 |
Affected:
0 , < 3.12.1
(semver)
Unaffected: 3.12.1 (semver) cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* |
Date Public
2026-09-03 00:00
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