SafeScript, a safe version of JavaScript for executing untrusted code
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HN · launched Nov 8, 2026 · 12 upvotes (top 36%) · 0 views
Niche: scripting and execution runtimes · 56 launches, 4 in the last 7 days · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 56 launches in scripting and execution runtimes →
Could you build this?
No A secure sandbox for running untrusted JavaScript needs rigorous language-semantics and security expertise, since small mistakes lead to sandbox escapes that vibe coding won't reliably catch.
What it would actually take: A real version means building or forking a JavaScript interpreter or compiler with strict capability restrictions, then testing it against escape techniques. It requires deep knowledge of JS semantics, sandbox design, and adversarial security review. Existing projects like QuickJS, SES, and Deno's permission model are the usual starting points.
Discussion
7 comments analyzed.
Competitors mentioned: Lua, Erlang, Google CaJa, QuickJS, Node VM isolates
Concerns raised: Unclear what 'safe' means in SafeScript, Malicious scripts can exhaust host memory, Runtime instrumentation for memory limits too costly, Memory limits not enforced outside PHP and QuickJS
Feature requests: Static analysis to reject memory-wasting scripts, Instrument JS code to enforce memory limits
Competitors
Other products that read as similar to this one : 1676 launches clear the similarity bar, closest 8 shown.
Attention rank: #583 of 1677 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 373 days after the earliest competitor.
- JSLike, a CSP-Safe Interpreter for JS, TS, JSX, TSX in JS · hn · 2026-05-09 · 6 upvotes · similarity 0.65
- php-safe · github · 2026-10-21 · 14 upvotes · similarity 0.64
- headerlint · github · 2026-09-30 · 8 upvotes · similarity 0.62
- pandaward · github · 2026-10-27 · 42 upvotes · similarity 0.60
- Tailsnitch · hn · 2026-01-05 · 280 upvotes · similarity 0.60
- is-malicious · github · 2026-09-18 · 22 upvotes · similarity 0.58
- Bastion · github · 2026-10-22 · 57 upvotes · similarity 0.57
- zig-secretstack · github · 2026-10-08 · 19 upvotes · similarity 0.57
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