Sourced from vm2's releases.

v3.11.3

What's Changed

Security fix

• GHSA-248r-7h7q-cr24 — Async generator yield*-return thenable exception capture (RCE)

Documentation

• docs/ATTACKS.md updated through Category 29.

Full Changelog: patriksimek/vm2@v3.11.2...v3.11.3

Sourced from vm2's changelog.

[3.11.3]

Single advisory closed. Patch release — no API changes.

Security fix

• GHSA-248r-7h7q-cr24 — async generator yield*-return thenable exception capture. Calling i.return(thenable) on an async generator delegating to a no-return inner iterator let V8's PromiseResolveThenableJob capture synchronous throws from the thenable's .then and surface them to sandbox code as iterator results — bypassing both the transformer's catch instrumentation and the globalPromise.prototype.then rejection sanitiser. Two-layer defense on %AsyncGeneratorPrototype%.next/.return/.throw in lib/setup-sandbox.js: every iterator-result promise routes value and rejection through handleException, and every thenable argument is replaced with a sandbox-realm wrapper whose .then is a fixed safeThen that sanitises sync throws and recursively re-wraps any nested thenable handed to resolve(...). When safeThen reads value.then and it is non-function, the wrapper always resolves with a {__proto__: null} shadow so V8's re-read of .then cannot observe attacker-controlled values — closing every counting/self-replacing-getter TOCTOU variant. Trade-off: identity is not preserved for non-thenable values passed to i.return(x). ATTACKS.md Category 29.

• 093494c fix(GHSA-248r-7h7q-cr24): close async generator yield*-return thenable except...
• See full diff in compare view

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