GitHub Advisory Database4 days ago

Elo JavaScript emitter has sandbox escape to arbitrary Node.js / browser code execution via unfiltered .constructor member access

Summary An unauthenticated attacker who controls a string passed to any Elo JavaScript-emission path — defaultFormats.elo.parse(), the bin/elo CLI, or the live browser playground at elo-lang.org/try — can execute arbitrary code in the host JavaScript runtime. A payload built from

Published November 3, 2026 · 5:53 PM
Summary An unauthenticated attacker who controls a string passed to any Elo JavaScript-emission path — defaultFormats.elo.parse(), the bin/elo CLI, or the live browser playground at elo-lang.org/try — can execute arbitrary code in the host JavaScript runtime. A payload built from
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Source: GitHub Advisory Database

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