Mozilla uses Anthropic's Mythos AI to find 271 Firefox vulnerabilities

COVERAGE [27]

1. The Decoder TIER_1 · Maximilian Schreiner · 2026-05-08 09:23

   Mozilla's agentic AI pipeline turns Claude Mythos Preview loose and finds 271 unknown Firefox vulnerabilities

   <p><img alt="" class="attachment-full size-full wp-post-image" height="1024" src="https://the-decoder.com/wp-content/uploads/2025/04/firefox_mozilla_logo_walls-2.png" style="height: auto; margin-bottom: 10px;" width="1536" /></p> <p> Anthropic's Claude Mythos Preview uncovered 27…

2. Ars Technica — AI TIER_1 · Dan Goodin · 2026-05-07 19:18

   Mozilla says 271 vulnerabilities found by Mythos have "almost no false positives"

   The developer of Firefox says it has "completely bought in" on AI-assisted bug discovery.

3. Ars Technica — AI TIER_1 · Kyle Orland · 2026-04-21 21:40

   Mozilla: Anthropic's Mythos found 271 security vulnerabilities in Firefox 150

   CTO says new AI model is "every bit as capable" as world's best security researchers.

4. HN — anthropic stories TIER_1 · cpeterso · 2026-04-21 19:49

   Mozilla Used Anthropic's Mythos to Find and Fix 271 Bugs in Firefox

5. Mastodon — sigmoid.social TIER_1 · [email protected] · 2026-05-10 12:13

   Media claims Anthropic Mythos found 271 Firefox bugs. I checked the actual reports. GPT 3.5 from 2022 could find the same vulnerability. The real story? Mozilla

   Media claims Anthropic Mythos found 271 Firefox bugs. I checked the actual reports. GPT 3.5 from 2022 could find the same vulnerability. The real story? Mozilla's workflow, not AI hype. Link in the comment # AI # Firefox # Security

6. Mastodon — sigmoid.social TIER_1 · [email protected] · 2026-05-09 16:09

   🦊 Firefox Hardening: The AI Breakthrough Mozilla just revealed how they patched 423 vulnerabilities in a single month—more than the previous 15 months combined.

   🦊 Firefox Hardening: The AI Breakthrough Mozilla just revealed how they patched 423 vulnerabilities in a single month—more than the previous 15 months combined. Here is the "too long; didn't read" on their new security strategy: The Tool: Mozilla built an "agentic harness" using …

   LINKS hacks.mozilla.org/…/behind-the-scenes-har…
7. The Register — AI TIER_1 · 2026-05-07 23:32

   Mozilla boasts Mythos boosted Firefox bug cull

   Yet it remains unclear if Anthropic's uber model was effective, or if better model middleware is what makes the difference

8. TechCrunch AI TIER_1 · Russell Brandom · 2026-05-07 16:05

   How Anthropic’s Mythos has rewritten Firefox’s approach to cybersecurity

   Security researchers at Mozilla say Anthropic's Mythos has unearthed a wealth of high-severity bugs in Firefox.

9. Mastodon — sigmoid.social TIER_1 · [email protected] · 2026-04-27 09:33

   Firefox 150 fixed 271 vulnerabilities surfaced by Claude Mythos Preview. Before the hype carries us: * 271 findings, 3 credited CVEs. Most likely lower-severity

   Firefox 150 fixed 271 vulnerabilities surfaced by Claude Mythos Preview. Before the hype carries us: * 271 findings, 3 credited CVEs. Most likely lower-severity. Still a triage problem. * AISI 32-step benchmark: 3/10 full, 22/32 avg. Test ranges had no live defenders, no EDR, no …

10. The Register — AI TIER_1 · Rupert Goodwins · 2026-04-27 08:30

    Anthropic's magic code-sniffer: More Swiss cheese than cheddar, for now

    <h4>AI vuln-hunter finds what humans taught it to find. Funny that</h4> <p><strong>Opinion</strong> In retrospect, calling it Mythos made it a hostage to fortune. Anthropic may have hoped that the name implied its AI code security model had mythical god-like powers, but there's a…

11. Mastodon — fosstodon.org TIER_1 · [email protected] · 2026-05-11 14:26

    Media claims Anthropic Mythos found 271 Firefox bugs. I checked the actual reports. GPT 3.5 from 2022 could find the same vulnerability. The real story? Mozilla

    Media claims Anthropic Mythos found 271 Firefox bugs. I checked the actual reports. GPT 3.5 from 2022 could find the same vulnerability. The real story? Mozilla's workflow, not AI hype. Link in the comment # AI # Firefox # Security

12. Mastodon — fosstodon.org TIER_1 · xceptn · 2026-05-10 13:28

    Mozilla says 271 vulnerabilities found by Mythos have "almost no false positives" https:// arstechnica.com/information-te chnology/2026/05/mozilla-says-271-vuln

    Mozilla says 271 vulnerabilities found by Mythos have "almost no false positives" https:// arstechnica.com/information-te chnology/2026/05/mozilla-says-271-vulnerabilities-found-by-mythos-have-almost-no-false-positives/ # AI # LLM # GenerativeAI # Linux # FOSS # OpenSource # Tech…

    LINKS arstechnica.com/…/mozilla-says-271-vulner…
13. Mastodon — fosstodon.org TIER_1 · [email protected] · 2026-05-08 15:30

    # Mozilla says 271 vulnerabilities found by # Mythos have “almost no false positives” https:// arstechnica.com/information-te chnology/2026/05/mozilla-says-271-

    # Mozilla says 271 vulnerabilities found by # Mythos have “almost no false positives” https:// arstechnica.com/information-te chnology/2026/05/mozilla-says-271-vulnerabilities-found-by-mythos-have-almost-no-false-positives/ # Firefox # AI # cybersecurity # Anthropic # Claude

    LINKS arstechnica.com/…/mozilla-says-271-vulner…
14. Mastodon — fosstodon.org TIER_1 · [email protected] · 2026-05-08 08:38

    Mozilla fixed 423 Firefox security bugs in April using Claude Mythos—but the real insight isn't model access. It's the verification harness that turns AI findin

    Mozilla fixed 423 Firefox security bugs in April using Claude Mythos—but the real insight isn't model access. It's the verification harness that turns AI findings into reproducible crashes, triage queues, and human-reviewed patches. The bottleneck remains engineering capacity, no…

    LINKS implicator.ai/the-firefox-lesson-is-not-m…
15. Mastodon — fosstodon.org TIER_1 · [email protected] · 2026-05-08 08:31

    - *Big* update on AI model interpretability from Anthropic: https://www. anthropic.com/research/natural -language-autoencoders with open weight models: https://

    - *Big* update on AI model interpretability from Anthropic: https://www. anthropic.com/research/natural -language-autoencoders with open weight models: https:// github.com/kitft/natural_langu age_autoencoders - + Dream state for Agents to clean up memories: https:// platform.clau…

    LINKS anthropic.com/…/natural-language-autoenco… github.com/…/natural_language_autoencoders platform.claude.com/…/dreams hacks.mozilla.org/…/behind-the-scenes-har… xeiaso.net/…/abstain-from-install platform.claude.com/…/ma xeiaso.net/…/abstain-f
16. Mastodon — fosstodon.org TIER_1 Polski(PL) · [email protected] · 2026-05-07 21:35

    AI Model Mythos, developed by Anthropic, redefines software vulnerability detection. Collaboration with Mozilla has identified thousands of bugs in Firefox.

    Model AI Mythos, opracowany przez Anthropic, redefiniuje wykrywanie luk w oprogramowaniu. Współpraca z Mozillą pozwoliła zidentyfikować tysiące błędów w Firefoksie, w tym krytyczne luki sprzed 15 lat, które umykały ludzkim programistom. # si # ai # sztucznainteligencja # wiadomoś…

    LINKS aisight.pl/…/bezpieczenstwo-firefox-mytho… aisight.pl/…/Awarie-i-cyberataki-tydzien-…
17. Mastodon — fosstodon.org TIER_1 · [email protected] · 2026-04-29 07:37

    Three numbers from Firefox 150: 271 vulns surfaced by Claude Mythos 3 credited to Claude as standalone CVEs 98% below the standalone-CVE bar Not a failure of th

    Three numbers from Firefox 150: 271 vulns surfaced by Claude Mythos 3 credited to Claude as standalone CVEs 98% below the standalone-CVE bar Not a failure of the model. The 4-stage funnel working as designed: finding → reachability → exploitability → impact. Part 2 of The Mythos …

18. Mastodon — mastodon.social TIER_1 · aihaberleri · 2026-05-08 09:44

    📰 Agentic AI Pipeline Uncovers 271 Firefox 150 Vulnerabilities in 2026 — Including 12 Zero-Days An agentic AI pipeline powered by Claude Mythos Preview uncovere

    📰 Agentic AI Pipeline Uncovers 271 Firefox 150 Vulnerabilities in 2026 — Including 12 Zero-Days An agentic AI pipeline powered by Claude Mythos Preview uncovered 271 previously unknown vulnerabilities in Firefox, revolutionizing how open-source software is secured. Mozilla is now…

    LINKS aihaberleri.org/…/agentic-ai-pipeline-unc…
19. Mastodon — mastodon.social TIER_1 Türkçe(TR) · aihaberleri · 2026-05-08 09:44

    📰 271 Unknown Security Vulnerabilities in Firefox: Discovered with Claude Mythos AI (2026) Mozilla, the AI-based system Claude Mythos Preview, Firefox 1

    📰 Firefox'ta 271 Bilinmeyen Güvenlik Açığı: Claude Mythos AI ile Keşfedildi (2026) Mozilla, yapay zekâ tabanlı bir sistem olan Claude Mythos Preview'i Firefox 150 kod tabanına salarak 271 bilinmeyen güvenlik açığı tespit etti. Bu keşif, AI'nın yazılım güvenliğindeki devrimci rolü…

    LINKS aihaberleri.org/…/firefoxta-271-bilinmeye…
20. Mastodon — mastodon.social TIER_1 · aihaberleri · 2026-05-08 09:17

    📰 Firefox Security in 2026: AI Uncovers 100+ Vulnerabilities, Including 22 Zero-Days Mozilla has partnered with Anthropic to deploy Claude Opus 4.6 in a groundb

    📰 Firefox Security in 2026: AI Uncovers 100+ Vulnerabilities, Including 22 Zero-Days Mozilla has partnered with Anthropic to deploy Claude Opus 4.6 in a groundbreaking AI-driven security initiative that uncovered over 100 bugs in Firefox, including 22 critical security flaws. The…

    LINKS aihaberleri.org/…/firefox-security-in-202…
21. Mastodon — mastodon.social TIER_1 Türkçe(TR) · aihaberleri · 2026-05-08 09:17

    📰 22 Zero-Day Vulnerabilities Discovered in Firefox with Claude AI! Mozilla Fixed Them in 72 Hours (2026) Anthropic's Claude Opus 4.6 AI model, 22 critical vulnerabilities in the Firefox browser

    📰 Claude AI ile Firefox'ta 22 Sıfır Gün Açığı Keşfedildi! Mozilla 72 Saatte Düzeltti (2026) Anthropic'ın Claude Opus 4.6 AI modeli, Firefox tarayıcısında 22 kritik güvenlik açığı keşfetti. Mozilla, bu delikleri 72 saat içinde kapattı — bu, yapay zekanın yazılım güvenliğindeki dev…

    LINKS aihaberleri.org/…/claude-ai-ile-firefoxta…
22. Mastodon — mastodon.social TIER_1 · aihaberleri · 2026-05-08 09:17

    📰 DeepSeek for Mac 2026: Run Local AI on Apple Silicon (Ollama, LM Studio, MLX) DeepSeek for Mac enables users to run advanced open-source LLMs locally on Apple

    📰 DeepSeek for Mac 2026: Run Local AI on Apple Silicon (Ollama, LM Studio, MLX) DeepSeek for Mac enables users to run advanced open-source LLMs locally on Apple Silicon, bypassing cloud dependency. With optimized quantization and native support, it’s transforming personal AI work…

    LINKS aihaberleri.org/…/deepseek-for-mac-2026-r…
23. Mastodon — mastodon.social TIER_1 Română(RO) · aihaberleri · 2026-05-08 09:17

    📰 Salvatore Sanfilippo Developed DeepEngine Inference Engine for DeepSeek V4 | Apple Silicon AI'd... Redis founder Salvatore Sanfilippo, DeepSeek V4's ye

    📰 Salvatore Sanfilippo, DeepSeek V4 İçin DeepEngine Inferans Motoru Geliştirdi | Apple Silicon AI'd... Redis'in kurucusu Salvatore Sanfilippo, DeepSeek V4'in yerel performansını kökten değiştirmek için özel bir inferans motoru tasarladı. Bu hamle, açık kaynak AI dünyasında yeni b…

    LINKS aihaberleri.org/…/salvatore-sanfilippo-de…
24. Mastodon — mastodon.social TIER_1 한국어(KO) · [email protected] · 2026-05-07 21:41

    Hardening Firefox with Claude Mythos Preview Firefox discovered and fixed an unprecedented number of potential security bugs using Claude Mythos Preview and other AI models. Initially, the accuracy of AI-generated security bug reports was low, but the model

    Hardening Firefox with Claude Mythos Preview Firefox는 Claude Mythos Preview와 기타 AI 모델을 활용해 전례 없는 수의 잠재적 보안 버그를 발견하고 수정했다. 초기에는 AI가 생성한 보안 버그 리포트의 정확도가 낮았으나, 모델 성능 향상과 효과적인 활용 기법 개발로 실제 취약점을 찾아내는 데 성공했다. 이 과정에서 AI 기반 하드닝 파이프라인을 구축해 대규모 병렬 분석과 버그 관리가 가능해졌으며, 최신 모델로 교체하며 탐지 효율을 높였다.…

    LINKS hacks.mozilla.org/…/behind-the-scenes-har…
25. Mastodon — mastodon.social TIER_1 한국어(KO) · [email protected] · 2026-05-07 21:40

    Handwritten SDKs Are Dead WorkOS built a pipeline that automatically generates SDKs for multiple languages using AI-powered code generation and OpenAPI specifications. To address the inefficiency and inconsistency of existing manual SDK maintenance, it parses OpenAPI to create an intermediate representation (IR),

    Handwritten SDKs Are Dead WorkOS는 AI 기반 코드 생성과 OpenAPI 스펙을 활용해 여러 언어용 SDK를 자동 생성하는 파이프라인을 구축했다. 기존 수작업 SDK 유지보수의 비효율과 불일치를 해결하기 위해, OpenAPI를 파싱해 중간 표현(IR)을 만들고, 언어별 이미터가 IR을 바탕으로 각 언어 특성에 맞는 SDK 코드를 생성한다. AI 모델 Claude는 이미터 확장과 언어별 변환에 특화된 지식을 적용해 일관성 있고 품질 높은 SDK 생성을 지원한다. 이 접근법은…

    LINKS workos.com/…/autogenerating-sdks-with-ai
26. Mastodon — mastodon.social TIER_1 · [email protected] · 2026-05-07 19:52

    Mozilla says Anthropic Mythos found 271 vulnerabilities in Firefox with "almost no false positives", transforming bug-finding into what engineers call "agentic

    Mozilla says Anthropic Mythos found 271 vulnerabilities in Firefox with "almost no false positives", transforming bug-finding into what engineers call "agentic AI security". https:// arstechnica.com/information-te chnology/2026/05/mozilla-says-271-vulnerabilities-found-by-mythos-…

    LINKS arstechnica.com/…/mozilla-says-271-vulner…
27. Mastodon — mastodon.social TIER_1 · [email protected] · 2026-04-27 05:28

    Attackers have AI. So now defenders need # AI . So vendors are shipping fast. And somewhere in that chain, someone hands access to a third-party vendor, and Ant

    Attackers have AI. So now defenders need # AI . So vendors are shipping fast. And somewhere in that chain, someone hands access to a third-party vendor, and Anthropic's most restricted product ends up in unauthorized hands. This is the new normal: accelerated development, acceler…