GHSA-7cg8-pq9v-x98q
GHSA-7cg8-pq9v-x98q · Sandbox Breakout in realms-shim
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Versions of `realms-shim` prior to 1.2.1 are vulnerable to a Sandbox Breakout. The Realms evaluation function has an option to apply Babel-like transformations to the source code before it reaches the evaluator. One portion of this transform pipeline exposed a primal-Realm object to the rewriting function. Confined code which used the evaluator itself could provide a malicious rewriter function that captured this object, and use it to breach the sandbox. ## Recommendation Upgrade to version 1.2.1 or later.
CVSS 9.8 · Critical · Fix available
- Published
- Updated
Stack: node
Affected products and versions
realms-shim npm
- Affected ranges
- SEMVER: < 1.2.1
Update to 1.2.1