https://db.gcve.eu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 08 Oct 2026 20:35:28 +0000 https://db.gcve.eu/vuln/bdu:2026-15731 bdu:2026-15731 https://db.gcve.eu/vuln/bdu:2026-15731 https://db.gcve.eu/vuln/fkie_cve-2026-100722 <p>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&#39;s strict unhandled-rejection policy, is promoted to an uncaught exception that terminates the host process.</p> <p>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&#39;s strict unhandled-rejection policy, is promoted to an uncaught exception that terminates the host process.</p> https://db.gcve.eu/vuln/fkie_cve-2026-100722 https://db.gcve.eu/vuln/ghsa-2v2p-6j97-cjg9 <p><strong>Affected:</strong> npm: vm2</p> <p>## Summary</p> <p>An untrusted script run by `VM.run` can construct an embedder-exposed host function that returns a rejected native Promise and ignore the result. The sandbox-to-host `construct` trap forwards that Promise without applying the host-side rejection handling already used by the neighboring `apply` trap, so Node&#39;s strict unhandled-rejection policy terminates the host process.</p> <p>## Technical Details</p> <p>The precondition is an application-supplied constructable host function in the VM sandbox whose constructor body returns a native rejected Promise. In JavaScript, an object explicitly returned by a constructor replaces the newly allocated instance, so `new HostReject()` produces that Promise.</p> <p>`VM.run` executes the attacker-controlled source. For an ordinary host-function call, `BaseHandler.apply` invokes the host function, calls `markHostPromiseHandled(ret)`, and then wraps the result. The adjacent `BaseHandler.construct` path instead calls `Reflect.construct` and returns `thisFromOtherWithFactory(...)` without calling the same sanitizer. The rejected host Promise therefore crosses the bridge still unhandled. With Node&#39;s strict unhandled-rejection behavior, the rejection is promoted to an uncaught exception and kills the host process.</p> <p>The shortest path is `VM.run` → the sandbox bridge → `BaseHandler.construct`. The control changes only the guest expression: it attaches `.catch(function () {})` to the constructed Promise before ignoring it. The host function, VM configurat…</p> <p><strong>Affected:</strong> npm: vm2</p> <p>## Summary</p> <p>An untrusted script run by `VM.run` can construct an embedder-exposed host function that returns a rejected native Promise and ignore the result. The sandbox-to-host `construct` trap forwards that Promise without applying the host-side rejection handling already used by the neighboring `apply` trap, so Node&#39;s strict unhandled-rejection policy terminates the host process.</p> <p>## Technical Details</p> <p>The precondition is an application-supplied constructable host function in the VM sandbox whose constructor body returns a native rejected Promise. In JavaScript, an object explicitly returned by a constructor replaces the newly allocated instance, so `new HostReject()` produces that Promise.</p> <p>`VM.run` executes the attacker-controlled source. For an ordinary host-function call, `BaseHandler.apply` invokes the host function, calls `markHostPromiseHandled(ret)`, and then wraps the result. The adjacent `BaseHandler.construct` path instead calls `Reflect.construct` and returns `thisFromOtherWithFactory(...)` without calling the same sanitizer. The rejected host Promise therefore crosses the bridge still unhandled. With Node&#39;s strict unhandled-rejection behavior, the rejection is promoted to an uncaught exception and kills the host process.</p> <p>The shortest path is `VM.run` → the sandbox bridge → `BaseHandler.construct`. The control changes only the guest expression: it attaches `.catch(function () {})` to the constructed Promise before ignoring it. The host function, VM configurat…</p> https://db.gcve.eu/vuln/ghsa-2v2p-6j97-cjg9