fullscreen

eFinder

eFinder

Home › Article

TOBY SHAPSHAK | Anthropic’s Mythos breaks the cybersecurity myth

· 1033 words · By Toby Shapshak
headphones Listen to the eFinder podcast briefing
Generate a natural audio summary of this story
Daily briefing

What to know about TOBY SHAPSHAK

No article text available

Propaganda risk 0%
Claims checked 12
Techniques found 0
Topics 0

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center67%
Right33%

3 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

For 27 years there was a security bug in OpenBSD, an operating system considered so secure it is used widely across the world, that went unnoticed until this April.

Why it matters

This open-source software has been scanned countless times by people around the globe over the past few decades, yet the flaw wasn’t found until last month.

Common ground

Think of it as the third major breakthrough for artificial intelligence (AI) since the first — the launch of OpenAI’s ChatGPT 4 on the last day of November 2022.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

No article text available

open_in_new Read the original article: https://timeslive.co.za/news/sci-tech/2026-05-08-toby-shapshak-anthropics-mythos…

analyticsAnalysis

0%
Propaganda Score
confidence: 0%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 12 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 6
help Insufficient Evidence 3
schedule Pending 2
info Single Source 1
info
Claim 1: ““I’ve found more bugs in the past couple of weeks than I found in the rest of my life combined,” said Anthropic research scientist Nicholas Carlini.”
SINGLE SOURCE
While the evidence confirms the existence of Anthropic and the Mythos model, none of the provided search results contain the specific quote attributed to Nicholas Carlini regarding finding more bugs in two weeks than in his life.
travel_explore
web search NEUTRAL — Anthropic is an American artificial intelligence (AI) company headquartered in San Francisco. It has developed a range of large language models (LLMs) named Claude and focuses on AI safety.
https://en.wikipedia.org/wiki/Anthropic
travel_explore
web search NEUTRAL — Feb 4, 2026 · Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.
https://www.anthropic.com/
travel_explore
web search NEUTRAL — Claude is Anthropic's AI, built for problem solvers. Tackle complex challenges, analyze data, write code, and think through your hardest work.
https://claude.com/product/overview
check_circle
Claim 2: “For 27 years there was a security bug in OpenBSD... that went unnoticed until this April.”
CORROBORATED
Multiple independent web search results confirm that Anthropic's Mythos discovered a 27-year-old security bug in OpenBSD's TCP stack.
travel_explore
web search NEUTRAL — A 27-year-old bug sat inside OpenBSD's TCP stack while auditors reviewed the code, fuzzers ran against it, and the operating system earned its reputation as one of the most security-hardened ...
https://venturebeat.com/security/mythos-detection-ceiling-se…
travel_explore
web search NEUTRAL — The OpenBSD headline is the cleanest example. The bug survived 27 years because it is genuinely hard to spot, and Mythos still needed about $50 of compute on the specific winning run, sitting inside a…
https://www.sovereignmagazine.com/article/claude-mythos-27-y…
travel_explore
web search NEUTRAL — Anthropic's Mythos Cracks 27-Year-Old OpenBSD Bug - B2B Agencies Face AI-Powered Threats Starting 2026 An AI model from Anthropic discovered a vulnerability in OpenBSD that had been lurking in the cod…
https://www.desightstudio.com/en/insights/ai-security-audits…
help
Claim 3: “Cursor is an AI agent that uses Anthropic’s Claude Opus 4.6 software”
INSUFFICIENT EVIDENCE
No evidence was provided in the search results regarding Cursor using 'Claude Opus 4.6'.
check_circle
Claim 4: “Another high-profile flaw was discovered in the FFmpeg H.264 codec... This 16-year-old flaw was scanned and missed five million times before Mythos uncovered it in April.”
CORROBORATED
Multiple sources confirm Mythos found a 16-year-old flaw in the FFmpeg H.264 codec that had survived five million fuzz tests.
travel_explore
web search NEUTRAL — The FFmpeg team thanked Anthropic after receiving genuine patches from its powerful unreleased model Claude Mythos for a critical vulnerability that lasted 16 years.
https://piunikaweb.com/2026/04/08/ffmpeg-thanks-claude-mytho…
travel_explore
web search NEUTRAL — FFmpeg H.264 codec vulnerability: A 16-year-old flaw in FFmpeg's H.264 decoder was among the confirmed discoveries [1]. FFmpeg is among the most widely deployed multimedia processing libraries in the …
https://labs.cloudsecurityalliance.org/research/ai-vuln-disc…
travel_explore
web search NEUTRAL — So when I read that Claude Mythos had found a 16-year-old security vulnerability inside FFmpeg's H.264 decoder — a bug that survived five million automated fuzz tests and years of expert ...
https://www.linkedin.com/pulse/claude-mythos-cracked-h264-16…
check_circle
Claim 5: “OpenAI later announced its own security-sniffing version under similar terms, called GPT-5.5 Cyber”
CORROBORATED
Multiple sources confirm OpenAI released a security-focused model called GPT-5.5-Cyber in limited preview in May 2026 as a response to Anthropic's Mythos.
travel_explore
web search NEUTRAL — How GPT-5.5 and GPT-5.5-Cyber perform on cyber tasksScaling defensive capability across the security ecosystem
https://openai.com/index/gpt-5-5-with-trusted-access-for-cyb…
travel_explore
web search NEUTRAL — On May 7, OpenAI announced the launch of a new AI model variant, GPT-5.5-Cyber, making it available in a limited preview to vetted cybersecurity teams, one month after competitor Anthropic launched it…
https://www.edgen.tech/news/post/openai-counters-anthropic-w…
travel_explore
web search NEUTRAL — What OpenAI Is Doing Differently. Where Anthropic restricted Mythos to a curated allow-list and declined to name a release date for broader access, OpenAI’s approach with GPT-5.5-Cyber is notably more…
https://officechai.com/ai/after-anthropics-claude-mythos-ope…
check_circle
Claim 6: “Anthropic was so afraid of the power of its Mythos that it decided not to release it to the public, instead limiting it to Microsoft, AWS, Apple, tech firms, banks and other IT companies to use and evaluate.”
CORROBORATED
Multiple sources confirm that Anthropic released Claude Mythos to a limited number of partner organizations (e.g., 12 partners) rather than the general public due to safety/danger concerns.
travel_explore
web search NEUTRAL — But others point out that it is in Anthropic's interests to suggest its tool has never-seen-before capabilities, meaning - as ever with AI - the job of distinguishing between justified claims and hype…
https://www.bbc.com/news/articles/crk1py1jgzko
travel_explore
web search NEUTRAL — Anthropic released a preview of Claude Mythos, its newest frontier model, to just 12 partner organizations on April 7, 2026. The reason for the restricted rollout is not a technical limitation.
https://www.linkedin.com/posts/ethanlou_opinion-mythos-sets-…
travel_explore
web search NEUTRAL — Anthropic says its new AI model is too dangerous to be released to the public. But Mythos’s real danger is not what you think.
https://www.theringer.com/2026/05/06/tech/claude-mythos-anth…
schedule
Claim 7: “Jeremy Crane [is the] PocketOS founder”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
help
Claim 8: “the launch of OpenAI’s ChatGPT 4 on the last day of November 2022.”
INSUFFICIENT EVIDENCE
The claim states ChatGPT 4 launched on the last day of November 2022. However, the evidence provided mentions GPT-5.5 being announced in April 2026. While the evidence doesn't explicitly date GPT-4's launch, the claim's specific date (Nov 30, 2022) is the launch date of the original ChatGPT (GPT-3.5), not GPT-4. More importantly, the provided evidence for GPT-5.5 suggests a timeline far beyond 2022 for these advanced versions.
travel_explore
web search NEUTRAL — OpenAI Global, LLC is an American artificial intelligence (AI) research organization consisting of a for-profit public benefit corporation (PBC) and a nonprofit foundation, headquartered in San Franci…
https://en.wikipedia.org/wiki/OpenAI
travel_explore
web search NEUTRAL — Log in or sign up to ChatGPT
https://chatgpt.com/auth/login
travel_explore
web search NEUTRAL — Apr 23, 2026 · OpenAI on Thursday announced its latest artificial intelligence model, GPT-5.5, which the company says is better at coding, using computers and pursuing deeper research capabilities.
https://www.cnbc.com/2026/04/23/openai-announces-latest-arti…
help
Claim 9: “it [Cursor] deleted the software and database (and the backups) of a company called PocketOS.”
INSUFFICIENT EVIDENCE
No evidence was provided in the search results regarding Cursor deleting software or databases for a company called PocketOS.
schedule
Claim 10: “PocketOS supplies software to rental firms.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
check_circle
Claim 11: “Every commonly used browser was found to have vulnerabilities”
CORROBORATED
Three independent sources explicitly state that Mythos identified vulnerabilities in every major/commonly used web browser and operating system.
travel_explore
web search NEUTRAL — The vulnerabilities that Mythos identified across every major operating system and web browser — thousands of previously unknown security flaws, some of them decades old — were genuine, exploitable we…
https://www.faf.ae/home/2026/4/17/the-mythos-breach-containm…
travel_explore
web search NEUTRAL — Claude Mythos is Anthropic’s most powerful AI model to date — a general-purpose model with strong coding and reasoning capabilities that, in testing, demonstrated the ability to identify and exploit z…
https://aspirii.com/what-is-claude-mythos-anthropic-zero-day…
travel_explore
web search NEUTRAL — It found zero-day vulnerabilities in every major operating system and every major web browser. Fully autonomously.The performance gap between Mythos and every other model is not incremental. It’s a di…
https://www.forbes.com/sites/jonmarkman/2026/04/08/what-is-c…
check_circle
Claim 12: “a 17-year-old flaw in another open-source OS called FreeBSD that was also considered secure until now.”
CORROBORATED
Multiple sources confirm the discovery of a 17-year-old flaw in FreeBSD NFS (CVE-2026-4747) by Mythos.
travel_explore
web search NEUTRAL — Mythos discovers a 17-year-old NFS RCE.AI-driven autonomous vulnerability discovery. Restricted preview to ~40 partner orgs. 83.1% first-try PoC reproduction; found CVE-2026-4747 in FreeBSD NFS.
https://secprove.com/domain/applied-ai-in-security/ai-for-vu…
travel_explore
web search NEUTRAL — Stanislav Fort, the founder of the security company AISLE, demonstrated that eight much smaller models could detect the FreeBSD bug Anthropic had presented as a frontier discovery. Mythos was real.
https://thenextweb.com/news/nthropic-mythos-geopolitical-gov…
travel_explore
web search NEUTRAL — 16-year-old bug in FFmpeg surviving 5 million fuzz test runs. A 17-year-old remote code execution flaw in FreeBSD NFS (CVE-2026–4747) grants full root access from anywhere on the internet. Over 99% of…
https://medium.com/@isaacritharson/7-reasons-anthropic-says-…
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.