Description
SES safely executes third-party JavaScript 'strict' mode programs in compartments that have no excess authority in their global scope. Prior to version 1.12.0, web pages and web extensions using `ses` and the Compartment API to evaluate third-party code in an isolated execution environment that have also elsewhere used `const`, `let`, and `class` bindings in the top-level scope of a `` tag will have inadvertently revealed these bindings in the lexical scope of third-party code. This issue has been patched in version 1.12.0. Workarounds for this issue involve either avoiding top-level `let`, `const`, or `class` bindings in `` tags, or change these to `var` bindings to be reflected on `globalThis`.
Details
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| ses | — | — |
| unknown | — | — |
References
Similar Threats
- Unknown MAL-2025-4719
- Unknown MAL-2025-4720
- Unknown RHSA-2012:1278
- Unknown RHSA-2012:1281
- Unknown RHSA-2010:0774
Exploit Protection
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