⚡ fast, secure and programmable microVM. ship with your app, self-host, BYOC, or run on our cloud. ideal for AI agents, dev containers, CI/CD, and more · YC F26
toronto
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microsandbox retweeted
Was wondering where my disk space went.
Therefore this exists now. You can simply wish software into existence.
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microsandbox retweeted
Silo: a native macOS/Linux app for sandboxes on your machine or remote ones. Powered by MicroSandbox.
Meant for letting agents run wild in isolated Linux VMs.
Open a workspace in your editor or terminal, forward ports, keep secrets on the host, scope GitHub access per sandbox, snapshot the environment.
github.com/0xpolarzero/silo
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microsandbox retweeted
Some progress: Secret injection now working. The agent doesn't know and see the secret, but gets injected at network level by @microsandbox
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thoughts and prayers to everyone running agents in containers. 🙄
We escaped Docker's hypervisor with three lines of bash. CVE-2026-77179: A container gets complete read and write access to the host filesystem.
When you mount a folder into a container, Docker's VMM uses virtio-fs, and the file server runs on the host.
Because of a TOCTOU bug, if a container opens a file, deletes it while holding its file handle open, and replaces the parent folder with a symlink, the kernel will follow the symlink to anywhere on the host.
Full technical breakdown:
accomplish.ai/blog/escaping-…
Community note
This affects Docker Sandboxes on macOS and Docker Desktop only if the new Docker VMM (beta, not default) is enabled; it is a virtio-fs shared workspace symlink/TOCTOU issue, not a general container or hypervisor escape.
docs.docker.com/security/secur…
cve.org/CVERecord?id=C…
docs.docker.com/ai/sandboxes/r…
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tired of agents breaking out of containers? run them in microsandbox.
docs.microsandbox.dev/gettin…
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microsandbox retweeted
okay Jev is an INSANE unlock, I just gave Mario a multiverse.
built "Mario Never Dies" with @typesafeai's Jev + microsandbox
Jev picks every move and every time Mario dies, we fork the entire VM into 4 timelines and try again.
whichever Mario survives becomes canon. it is like the others never happened.
After co-inventing ChatGPT, I kept asking myself: why have superhuman chat models not led to AGI?
I’ve spent the last 2 years in stealth building a new way to train models (RLCD), and a new type of frontier AI model that we are releasing today: Jev
• 20-200x faster
• 40-400x cheaper (w/ output tokens free)
• Frontier composable intelligence optimized for decisions
AFAICT the shortest path to AI-based economic revolution
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microsandbox retweeted
i got jev + an llm playing doom, with a twist: try several futures, then keep playing from the best outcome.
jev picks the moves. a custom harness uses @microsandbox to run attempts in parallel from the same checkpoint. the llm reviews what happened and guides what to try next.
not enough? it rewinds to an earlier checkpoint and tries another path.
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we've had microsandbox plugin running in @OmarchyLinux.
now we have omarchy running in microsandbox!
@OmarchyLinux running inside a @microsandbox microVM on Apple Silicon, in a native macOS window with keyboard and mouse. No QEMU, no Virtualization.framework: Rust libkrun on Hypervisor.framework, boots in seconds. @dhh @toksdotdev @theappcypher @tobi github.com/ya-luotao/msb-oma…
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microsandbox v0.6.10–v0.6.14 is out 🚀
Configurable SSH timeouts, 180x faster Windows disk copies, precompiled Ruby gems, and shorter CLI aliases. Plus fixes across networking, mounts, exec cleanup, and Linux packaging.
docs.microsandbox.dev/change…
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microsandbox retweeted
network rate limiting for microsandbox just shipped.
limit ingress or egress by bandwidth or packet rate or for one-time bursts.
by default, all sandbox network traffic is un-throttled.
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microsandbox retweeted
Released the sandbox part of my Software Factory @microsandbox in Nomad! github.com/jamescorbett/noma… just as easy as any other job.
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