@axios cybersecurity reporter, taking it day by day ✨ | 📩: sam.sabin@axios dot com, signal: SamSabin.01 (no pitches!)

Joined June 2011
Sam Sabin retweeted
we've found and have been working on disclosure for a remote code execution in a widely-deployed compression library. it's both an impactful issue and an example that shows how complicated it can be to coordinate patching, since it's integrated into a lot of downstream software:
During this red-teaming exercise, we also found a vulnerability that allows for unauthenticated remote code execution in Brotli, a widely-deployed compression library included in many pieces of software such as Node.js, Bun, and Envoy. The flaw could let an attacker run their own code on affected systems by sending or replying with malicious compressed data, without any need to create a user account. That is, an unpatched server that accepts compressed input could be taken over by a malicious client, and an unpatched client that accepts compressed input (such as “curl --compressed”) could be taken over by a malicious server. This root cause issue was actually fixed in the Brotli source code in February, but it wasn’t known at the time that it gave rise to a security vulnerability and there was no more recent release of Brotli. Since Brotli is built into other software, any software which includes this library needs to take the update too, followed by the users of that software. We disclosed the vulnerability to Brotli and other downstream projects such as Node.js, which released or are currently releasing security updates, and Brotli cut new release versions and published a CVE. More details on the patch and mitigations below: patchtheplanet.org/brotli
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Sam Sabin retweeted
maybe the point of cybersecurity was the friends we made along the way
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A brief update on the critical vulnerabilities in PHP:  We have not yet validated exploitation in the wild and we have no evidence of successful wide scale exploitation. There are currently several exploit PoCs publicly circulating, many of which appear to be "vibe-coded" and are incapable of remote code execution. We have validated some PoCs, however, that are capable of RCE against default deployments of mod_php but not PHP-FPM. Nonetheless, exploitation may have already begun in a limited fashion and the threat is viable and very serious. Defenders should: ​1) Patch & Restart by upgrading to PHP 8.5.12, 8.4.27, 8.3.36, or 8.2.35 and restarting web services ​2) Layer Temporary Safeguards at the network edge (WAF/proxy rules) and server configuration level if immediate patching requires a maintenance window ​3) Protect Credentials by monitoring for abnormal session traffic and rotating keys and passwords on compromised internet-facing PHP systems exposed prior to patching 🔗 We are continually updating our Cloud Security blog post on this topic with real-world guidance and actionable defense strategies as we learn more. Please keep monitoring these posts for updates as you prioritize your patching efforts: cloud.google.com/blog/produc…  🔗 Technical details from Wiz: wiz.io/blog/php2shell-php-rc… 🔗 Details of the exposure from VirusTotal: blog.virustotal.com/2026/10/…
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Sam Sabin retweeted
New: The three researchers OpenAI fired last month spent the summer fighting to keep AI's chain-of-thought process visible. Then, OpenAI asked to see their Signal chats. A week later, they were let go. More below from @keachhagey, @berber_jin1, and me. wsj.com/tech/ai/the-signal-c…
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as bad as things have gotten in the past 4 days, they are going to get a lot worse before they get better. security leaders, never let a crisis go to waste: please go to your boards and ask for help right now. not for ai, for the basics. (we need to hold on for ~18 months.)
The vulnerability tsunami is coming in just a few months and there won’t be enough time to patch critical infrastructure. Network isolation described below (air-gaps and data diodes!) needed now!
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PSA: in light of recent cyberattacks and vulnerabilities, I recommend everyone: * use a good password manager (1Password) and do not duplicate passwords * use two factor auth for everything important (not via sms!! Google Authenticator or better yet YubiKey) * Auto-updates on, and restart weekly so they actually install * Freeze your credit * Get an IRS Identity Protection PIN * Get your cell carrier to give you a port-out PIN or number lock that makes the carrier refuse to move your number without the PIN You can ask your claude code to audit what on your laptop is out of date and needs updating.
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SCOOP: Major U.S. banks are detecting unauthorized third-party AI agents inside customer accounts, including some attempting to take actions that appear to be independent of user instructions, sources told Axios. The findings have alarmed banking executives, who are racing to restrict access to their systems as AI moves at a velocity faster than financial institutions can respond, multiple industry and bank executives told Axios. Several banks are now preparing for worst-case and even “day after” scenarios, including how to rapidly secure or restore customer accounts if things go wrong, the people said. Several bank executives told Axios they're struggling to distinguish between human users and AI agents. One executive said banks also struggle to determine whether agents are authorized by customers or potentially operating without their permission, more akin to rogue agent behavior. Read my latest for Axios here: axios.com/2026/10/22/ai-agen…
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Some stats on #php2shell. In the 10 hours before it was publicly announced, across the @Cloudflare network we saw thousands of attempts to exploit it. That jumped to tens of thousands in the 45 minutes post announcement, hundreds of thousands within 2 hours, and millions now.
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Sam Sabin retweeted
Just used LiteLLM to create my first PHP website. The AI even suggested getting a certificate from eMudhra for HTTPS to protect my login page. The future looks really bright 🥳
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Sam Sabin retweeted
You know it's serious when heads of state get involved.
皆様に、今夜に対応して頂きたい大至急のお願いです。   多くのウェブサイトで使用されているPHPに関し、PHPのセキュリティチームが、重大な2件の脆弱性に関する注意喚起を行っています。   公開しているウェブサイトでPHPを使用しているか確認し、今夜、10月21日午後11時(日本時間)に公開される修正パッチについて、可及的速やかに適用できるよう準備をお願いします。   修正パッチを速やかに適用することが困難な場合は、例えばウェブサイト等を一時的に停止させることも、リスクを低減させるための有効策の一つと考えられます。   国家サイバー統括室のXアカウントでも関係する情報を発信していますので、そちらも参考にして下さい。 国家サイバー統括室(注意・警戒情報)(@cyber_forecast) / X
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Phil's post +1000. Also h/t to @riskybusiness last week that points out while vuln counts might be +YYYY% breaches might not. However, as @bradarkin raised, the CISO community is seeing a doubling in activity. While x2 < YYYY% it's still MASSIVE given global volumes of attacks. Brace yourselves. Reduce your attack surface, patch and get hygiene right on configs. Don't put your fridges on the Internet please. Deprecate your old appliances (VPN, Citrix, Zimbra, etc).
Breaches - What’s Going On? The anecdotal data is pointing to rising breach levels as some have predicted. I use the word anecdotal carefully (and not dismissively). It does seem there are rising numbers of incidents correlating with attacker adoption of AI tooling.  These incidents might not, or might not yet, show up in official incident reporting data for a few reasons. Many of the incidents might not be significant enough breaches that rise above the threshold of disclosure, are happening in organizations not required to disclose, or are not classic cyber events for which reporting is through different aggregate channels like frauds or other scams.  What is clear as many of us have been saying since even before the “Mythos moment” is that vulnerability count is not the main problem, rather it’s the industrialization of attackers that is or will be the problem. Attackers have been resource-constrained and sometimes skill-constrained. If one or both of these changes then our industry’s dirty little secret that more vulnerabilities have gone unexploited than exploited will change. All targets of opportunity will become victims.  This doesn’t mean that all such incidents are or will be significant, in fact as many have also said it’s not clear yet that AI is or will help attackers monetize the weaknesses they are exploiting (except perhaps in fraud and scams). Even without monetization improvements there will still be more attacks and consequent incidents from agent swarms, as we have seen in recent days. A lot of these seem reminiscent of “script kiddie” type attacks. That is exploiting easily found vulnerabilities with little craft or significant downstream consequence.  Irrespective of this, it does point out what we already knew, that there are way too many vulnerabilities out there to be exploited which even if they don’t cause significant breaches do create reliability risk and drain resources of security teams who have to respond to it all anyway. The bottom line is, nothing new, that more organizations need to implement and relentlessly enforce a more rigorous baseline of controls (MFA, segmentation, critical systems patching, run time controls, IAM, etc.) to present  a stronger default defense. This isn’t that difficult conceptually but it’s hard from a discipline and focus perspective. More organizations need to get way more relentless.  When all (or more) targets of opportunity will become victims, more organizations need to implement a higher baseline. The minimal viable defended organization bar is getting higher.
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Just watched the @netflix Instadocs about the @OpenAI cyberattack on @huggingface. Super disappointing, as they went for maximum anthropomorphism of the technology and full doomer mode. I spent more than two hours with them trying to correct all their mistakes and ground this in reality, explaining that agents are technological systems, not aliens. But it looks like the drive to scare people for maximum views was too strong. Also, they didn’t mention the lack of containment and monitoring of the agents, how closed-model safeguards blocked our defensive work, or how we defended ourselves with AI using an open model. And that we still lack a lot of information and transparency, including full agent traces and that companies need to remain accountable for what their agents do. It ends up being a fun sci-fi movie though!
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Sam Sabin retweeted
This report on a Chinese threat actor using AI to automate hundreds of attacks has a very funny conclusion:
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Sam Sabin retweeted
11 days ago, our team @AnthropicAI launched OSS Scanner to give open source projects free, periodic vulnerability scans from our strongest models, inspired by OSS-Fuzz. Some numbers so far: • ~650 projects applied • 114 accepted • 77 critical and 803 high model-rated findings reported (we haven’t scanned all projects yet) How our reports ended up flagged as malware, and other learnings/updates below 🧵
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Sam Sabin retweeted
Transition from vulpocalypse to breachpocalypse is here. IR firms are saturated & turning away work. Now one hacker unleashed AI agents on 1,200+ websites, compromising 100+ for ~$5,000 in tokens. $50 per hack. Agents won and compromised targets. reuters.com/legal/government…
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OpenCode is currently under a sustained cyberattack, and mid-incident they ran into the same problem Hugging Face did: the frontier models they were using for defense began refusing to help fight attacking agents because analyzing the attacks started triggering safety guardrails.
dax
@thdxrOct 18
Replying to @RhysSullivan
yes that was a bit frustrating mid incident when trying to investigate. they did quite a bit and then started refusing we got access to daybreak blue now so it's better
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Sam Sabin retweeted
Researchers at The Citizen Lab have for the first time released technical evidence of sophisticated mercenary spyware being distributed via online advertising. buff.ly/K8nohp5
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FoD-Space is a-go! @TomNovelly 🤝 @demarest_colin Subscribe here (it’s free): axios.com/signup/future-of-d…
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Sam Sabin retweeted
OPENAI to EMPLOYEES: If someone is trying to seduce you, first consider — could they be a spy??? OpenAI is warning its employees about honeypot spies and strangers with children in playgrounds ... a very fun one with @georgia_wells and @MeghanBobrowsky: wsj.com/tech/ai/ai-companies…
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