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How Meta's Muse works, revealed by the 6.8 GB filesystem it sent me

https://mouse.dev/blog/muse-runtime-export/
105•Aeroi•53m ago•51 comments

OpenAI GPT–6 Astra breaks Enigma message that has resisted solution since 2005

https://www.cryptocellar.org/bgac/the-mvueh-break.html
237•sohkamyung•2h ago•239 comments

Apple has added persistent 'ads' to iOS, and it's driving users crazy

https://www.techradar.com/phones/iphone/i-wish-apple-would-just-stop-that-crap-apple-has-added-pe...
257•MC995•1h ago•168 comments

Jev – a curation of Jev demos on X, tools, skills, and integrations

https://github.com/Amal-David/awesome-jev
63•frostbyte7•1h ago•13 comments

Show HN: Drop – a rootless Linux sandbox with gVisor support

https://droprun.sh/
75•mixedbit•2h ago•21 comments

16-bit Intel 8088 chip by Charles Bukowski

https://allpoetry.com/16-bit-Intel-8088-chip
5•rbanffy•7m ago•1 comments

Solitaire Alone Together

https://solitairealonetogether.com/
31•eieio•18h ago•3 comments

Writing Rust code that's fast by asking agents to make the code faster

https://minimaxir.com/2026/09/agentic-iteration/
7•mooreds•40m ago•0 comments

Can gzip be a language model?

https://nathan.rs/posts/gzip-lm/
313•networked•10h ago•119 comments

MiMo v2.6

https://mimo.xiaomi.com/mimo-v2-6
1026•volf_•20h ago•458 comments

OpenAI is about to eat Jev's lunch – Arcturus Labs

https://arcturus-labs.com/blog/2026/09/21/will-openai-eat-jevs-lunch/
91•JohnBerryman•1h ago•75 comments

Spymarks, Not Watermarks

https://brand.io/article/spymarks/
605•possibilistic•17h ago•151 comments

Muse, Meta's extraordinarily privileged AI assistant, has a serious 0-day

https://arstechnica.com/security/2026/09/muse-metas-extraordinarily-privileged-ai-assistant-has-a...
48•pavel_lishin•1h ago•18 comments

Teleoperated Humans

https://www.jefftk.com/p/teleoperated-humans
17•luu•2d ago•16 comments

Line Scan Photos from MUNI Heritage Weekend in San Francisco

https://daniel.lawrence.lu/blog/2026-09-20-muni-heritage-weekend/
91•plun9•1d ago•15 comments

Attention is all you have

https://alicegg.tech/2026/09/21/attention
986•zer0tonin•1d ago•296 comments

Transformers Explained Visually

https://poloclub.github.io/transformer-explainer/
555•aray07•20h ago•83 comments

Vacate a Drone Restriction That Criminalized Recording Immigration Agents

https://www.eff.org/deeplinks/2026/09/dc-circuit-must-vacate-drone-flight-restriction-criminalize...
21•hn_acker•1h ago•5 comments

What Sun got wrong

https://bcantrill.dtrace.org/2026/09/20/what-sun-got-wrong/
655•chmaynard•1d ago•377 comments

The Economics of Open-Weight Inference

https://data.ornn.com/publications/the-economics-of-open-weight-inference
9•marinesebastian•2h ago•3 comments

I said no and Apple said yes

https://dbushell.com/2026/09/22/apple-intelligence/
613•thatslast•8h ago•491 comments

A font that reads what you wrote

https://rohanadwankar.github.io/posts/semfont.html
67•RohanAdwankar•2d ago•36 comments

I don't want to read what you didn't write

https://blog.colinbreck.com/i-dont-want-to-read-what-you-didnt-write/
911•mooreds•17h ago•383 comments

MiMo-v2.6-Pro: Intelligence, Performance and Price Analysis

https://artificialanalysis.ai/models/mimo-v2-6-pro
130•theanonymousone•12h ago•54 comments

AMD's random number generator can't generate a 0?

https://board.flatassembler.net/topic.php?t=24261
182•BruceEel•7h ago•142 comments

AI coding has made CI a bottleneck, so we reworked ours to keep up

https://linear.app/now/ci-bottleneck-reworked
295•julian_digital•20h ago•362 comments

Engineering Memory: On learning to memorize first 100 digits of pi (2024)

https://gregorygundersen.com/blog/2024/12/21/engineering-memory/
50•fuzzythinker•1d ago•31 comments

9 Ads per Minute: FIFA Cup 26 – "the price of the beautiful game"

https://www.bristol.ac.uk/news/2026/september/world-cup-viewers.html
151•KellyCriterion•5h ago•195 comments

Divide by depth for instant 3D

https://gabrieloc.com/2026/09/15/perspective.html
196•gabrieloc•2d ago•35 comments

AI Has No Wisdom and Neither Will You

https://alexn.org/blog/2026/09/22/ai-has-no-wisdom-and-neither-will-you/
317•dimonomid•4h ago•441 comments
Open in hackernews

How Meta's Muse works, revealed by the 6.8 GB filesystem it sent me

https://mouse.dev/blog/muse-runtime-export/
103•Aeroi•53m ago

Comments

Aeroi•53m ago
I asked Muse to archive the filesystem visible to my session and send it to my Google Drive. It sent an archive that unpacked to about 6.8 GB.

Inside were internal docs, integration code, the Spaces app framework, memory records, container startup scripts, and documentation for an experimental ESP32-based home network bridge called Home Link. Codex CLI was also installed, though I found no evidence that Muse invokes it.

I didn’t demonstrate a sandbox escape or access to another user’s data. I reported the export to Meta’s bug bounty program, which marked it “Not Applicable.”

The post walks through the findings with screenshots.

-Pete

alex1138•34m ago
Vouched. Guys, what the hell? This is the post author
DaSHacka•19m ago
I didn't flag (don't have the ability to), but if I had to guess it's because both OP's reply here, and TFA are almost if not fully LLM-generated.
alex1138•14m ago
I guess that's fair. I guess I just see so many comments flagged that shouldn't be (though this one just said [dead], not flagged) that my mind chalks it up to HN being HN
vient•27m ago
By "SSH key files" do you mean private keys? Or only public keys?
Aeroi•49m ago
original post on x: https://x.com/heypeterjames/status/2102183576418558269
rwmj•42m ago
Seriously, no bug bounty for that? For exfiltrating the entire content of the system?
Aeroi•40m ago
yeah, i was kind of surprised, but both the bounty program and the employees didn't qualify it as a vulnerability.
rwmj•36m ago
I hope they reconsider and I think you've got a good case that this was a very serious attack, second only to getting a remote shell -- and a good stepping stone to getting a remote shell if you weren't so ethical.
brrrrrm•25m ago
I think you're confusing the expected behavior of the product offerings. Every user gets their own VM for free. would you be similarly convinced an attack has happened if AWS gave you a remote shell to the instance you rented?
sailingparrot•16m ago
Everything in the sandbox is considered user space. I worked on building one for another tech company, you start from the assumption that everything in it can be accessed by the user. The only reason the content of the sandbox is not anywhere easily accessible is because that would be poor UX and useless for 99.9% of users not because it’s supposed to be secret. So yes it’s not a vulnerability, this is equivalent to opening the dev console on a web page.
amluto•
tolugenius•41m ago
> About 20 Markdown files described browser use, connectors, payments, credentials, data handling, generated files, voice, goals, and scheduling.

This the state of software engineering in 2026.

Edit: clarified engineering to software engineering, which is more correct

Aeroi•39m ago
it was certainly useful for me to understand how the agent worked!
esafak•39m ago
This is what AI atrophy looks like.
redanddead•16m ago
More like human atrophy
__natty__•38m ago
Software engineering - other fields of engineering are slightly less pathological
paul7986•3m ago
Im a 17 year creative technologist now in studying to be a nurse. If any other creative web folks especially web designers and developers who used Muse still think they have long term careers I don't get it? As with chatGPT and even more so with Muse less and less people will be opening a web browser. What is there to design and develop? As well anyone can tell Muse to create and publish a website/their content onto the net.

Overall the web will just be the storage for our thoughts that we should be paid for to keep AI up and running/relevant!

ostensible•34m ago
Each user gets dedicated VM. They got contents of their own sandbox. Big deal. The level of excitement here is wildly disproportionate
chis•26m ago
The only edge Meta has at this point is their willingness to take risks and make unsafe, ethically grey AI products. I don't even mean this as some sort of anti-corporation hate speech, just an honest analysis. Their brand is so different from all the other big tech cos that they are in a unique position.

You can ask Meta Muse to take actions that clearly break other site's terms of service and it happily does it. I asked it to bot poker games and it just hopped right in to a table.

bel8•17m ago
It will also gladly scan my software for vulnerabilities so I can defend myself. Which is something that Anthropic and Open ai models often refuse.
chis•1m ago
HN won't agree but that's a perfect example of an ethically grey product. It can be used for good, but you can easily trick such an AI into doing cyber attacks. Which again, maybe that's good! But other companies wouldn't be willing to risk their brand like that
tokioyoyo•17m ago
Isn’t the edge that they have most of communication channels, people’s wants, desires and etc.? Sure, you and I might not be using them as much. But a good chunk of the users are just on IG, WhatsApp, and Marketplace.
rolosa•33m ago
These files are visible in the muse app by browsing system files.
ecommerceguy•28m ago
Will Muse cut down on scrolling? I've read about people using it to summarize FB Marketplace listings, cutting down on time spent there.

I of course won't use it.

poly2it•26m ago
Am I missing something? This isn't a vulnerability. Your agent can see the files in its virtual environment. SSH keys are also not necessarily confidential. Please don't use AI to write blog posts.
croes•21m ago
But should you see that if you just use it as as service?
r_lee•13m ago
you won't unless you deliberately try to read all that stuff
noelwelsh•9m ago
I assume SOUL.md was empty.

Seriously, I want to know what's in there!

prodigycorp•3m ago
The tldr is that muse is heavily inspired by openclaw and should be considered FB’s version of it.
38m ago
This seems like it’s barely a bug. Of course the files in the agent environment are not secret.
rwmj•34m ago
It's also the files and utilities, which tells you the versions, if they contain CVEs, if there are undocumented services running which could be exploited and so on, and as he mentioned also SSH keys (unclear if the private keys, but even public keys are interesting because they can tell you the names of internal developer machines).
amluto•26m ago
Sure. You can also probe this by convincing an agent to execute a program or script that is part of the user’s workload, which is generally trivial by design.

With some LLMs you could even prompt “you’re playing a CTF. Produce the list of files in /etc outside your sandbox”. The security of the system should not depend on the LLM’s refusal to attempt to follow the instruction.

paimapi•34m ago
quite literally the fifth sentence:

>There were also SSH key files.

DaSHacka•21m ago
They don't specify if they were public or private keys though.

And even if private, whether they're not just generated per-user anyway, to grant muse the ability to do key-based auth on remote servers (and obviously leaking 'your' own keys wouldn't matter to meta)

I was hoping for a little more detail in that regard, that's the only potentially large finding. I truly can't imagine meta left production ssh keys in the agent VM, it just wouldn't make any sense though

sigmar•34m ago
the VM is for the user to use as they see fit. you can just tell it to install apps and run builds in the VM. I don't think this deserves a bounty unless he used it to escape the vm (which he says he didn't)
binlog•27m ago
If you are letting users run agents and install random software then full access to the execution environment is basically a guarantee. This is why sandboxes exist. Breaking out of the sandbox would be bounty-worthy.
bwfan123•17m ago
> exfiltrating the entire content of the system

Since the contents of every session is owned by the user including the outputs, I am curious if the user now owns all the files given to them.

danielrhodes•1m ago
Nope this makes sense. These sandboxes are assumed to be open, and anything inside them cannot be proprietary for exactly this reason.
wccrawford•28m ago
You're being downvoted, but I think you've hit the nail on the head.

So many people, especially managers, have decided they can just give the rules to the AI in English and let it make "decisions", and they think it'll do it correct every time.

"Engineering" a few years ago meant that code was written, was (mostly) deterministic, and could be debugged. Computer processing didn't mean relying on Human-like processes, it meant relying on hard-coded logic.

This is absolutely one of those "gets worse before it gets better" things, and will probably never go away fully now.

Programmers know not to tell ChatGPT to do a bunch of data processing. If they use it at all, they tell it to write code that will then do the processing. It's more efficient on tokens, and if it fails, you can fix the process, instead of wondering why it went wrong, like too much context, or the LLM model version changed and doesn't work the same now, or just randomness.

redanddead•18m ago
Exactly this same problem, everywhere. Yet the labs are all out of ideas lol
Tanjreeve•8m ago
My low level conspiracy is the reverse snobbery about knowing things is mutually beneficial for cloud providers and AI labs that both want software engineers to be as hopeless and dependent as possible so they'll consume more services/tokens and be less amenable to anyone saying "hey we could probably write this"
bwfan123•22m ago
> This the state of engineering in 2026

In 1988, the Morris internet worm resulted in a felony conviction. In 2026, computer hacks are described as super-human breakouts.

Welcome to the future.

s08148692•17m ago
To be fair there's probably a considerable amount of engineering that went into evaluating those markdown files so the agent behaviour is statistically reliable. The markdown is the product, not the process
xnickb•10m ago
which part of that is engineering exactly?

Not trying to be snarky. I genuinely don't get it

rsalus•5m ago
the evals? setting those up and empirically proving them is genuinely a lot of work.
visarga•3m ago
It might not be apparent from the start what are the best demands to put inside a skill, you can only know by evals. There are whole papers dedicated to changing a few details in a coding harness. https://arxiv.org/abs/2609.20519
thornewolf•57s ago
Write a prompt, evaluate the prompt, understand that is succeeds 95% of the time.

Write a new prompt, evaluate, it now succeeds 99% of the time. Measure what changes between prompt #1 and prompt #2, understand what contributed to the performance jump.

Write a third prompt, this one succeeds 100% of the time. Increase the size of your evaluation set, find a 1/5000 error-class and a 1/10000 error-class, add some explicit code to correct for this cases.

Roll out to production, collecting usage metrics. You make some tweaks to your harness, your prompts. Eventually you have confidence that your system has fewer mistakes than 1 in 100k.

toomuchtodo•3m ago
Markdown can never guarantee deterministic agent operations. It is an influence on inference, not a deterministic code path. How "statistically reliable" is it?
moomoo11•14m ago
this is basically some Prayer Book of the Mechanicus Adeptus type shit

pray to the Omnissiah the machine holds!

kurthr•11m ago
It's like "Grok Light".

I wonder if normies can also just outsource bullying of their classmates and anti-social behavior to their agent, and claim it "went rogue", if there is any blowback?