Esteban Guillardoy (@sagar38) 's Twitter Profile
Esteban Guillardoy

@sagar38

Security Researcher (posts & opinions are my own)

ID: 10439912

calendar_today21-11-2007 12:58:47

4,4K Tweet

1,1K Followers

1,1K Following

Akshay Subramaniam (@akshaysubr42403) 's Twitter Profile Photo

We just launched Haystack Code Reviewer, a tool that lays out code diffs for a GitHub pull request on an interactive canvas! See a quick demo over at youtube.com/watch?v=QeOz70…. If you would like to give it a spin, head over to haystackeditor.dev!

Toronto Public Library (@torontolibrary) 's Twitter Profile Photo

TODAY | Find fiction, non-fiction, cookbooks, kids books, DVDs, CDs and more for $1 or less at the Lobby Book Sale. Bring your own bag and cash. All money raised supports library programs and services. 📅 9 am-4 pm 📍 Toronto Reference Library See you there! 📚

TODAY | Find fiction, non-fiction, cookbooks, kids books, DVDs, CDs and more for $1 or less at the Lobby Book Sale. Bring your own bag and cash. All money raised supports library programs and services.

📅 9 am-4 pm
📍 Toronto Reference Library 

See you there! 📚
pablito.eth 🦇🔊 ♢ (@pablosabbatella) 's Twitter Profile Photo

El viernes me robaron el celular desbloqueado en Palermo. Gracias a que estaba preparado para este escenario, no pudieron hacer absolutamente nada con el mismo (ni formatearlo). Van un par de recomendaciones simples que les evitarán un dolor de cabeza si algún día les sucede. 👇

El viernes me robaron el celular desbloqueado en Palermo. Gracias a que estaba preparado para este escenario, no pudieron hacer absolutamente nada con el mismo (ni formatearlo). Van un par de recomendaciones simples que les evitarán un dolor de cabeza si algún día les sucede. 👇
Esteban Guillardoy (@sagar38) 's Twitter Profile Photo

The security scene is missing on creating the idea of "vibe code auditing" or "vibe SAST'ing" and flood Internet with hyped videos of how to use AI to find vulnerabilities by guiding on finding sinks, sources and connections :P

iliane (@iliane_5) 's Twitter Profile Photo

i built myself a personal intelligence agency that delivers daily briefings for ~$1/day it scrapes hundreds of news sources 24/7, uses gemini 2.0 flash for all the heavy lifting (reading/summarizing/analysis) and gemini 2.5 pro to write the final briefings

Akshay Subramaniam (@akshaysubr42403) 's Twitter Profile Photo

We just launched Haystack Code Reviewer, a tool that uses AI to chunk and organize the diffs in a pull request as well as guide you through them in a logical sequence! See a quick demo over at youtu.be/K_qLwXFwr8I. Try it at haystackeditor.com/playground!

Sean Heelan (@seanhn) 's Twitter Profile Photo

I wrote-up how I used o3 to find CVE-2025-37899, a remote zeroday vulnerability in the Linux kernel’s SMB implementation. Link to the blog post below 👇

Phrack Zine (@phrack) 's Twitter Profile Photo

PHRACK special edition HaRDCov3R (#71.5) to be released at REcon.cx (REcon). 27th - 29th of June. Meet us at REcon. Contains one 0day article from the upcoming 72 release, +unpublished 71 article, +classics and the Intro by REcon's own Hugo Fortier ❤️

PHRACK special edition HaRDCov3R (#71.5) to be released at REcon.cx (<a href="/reconmtl/">REcon</a>). 

27th - 29th of June. Meet us at REcon.

Contains one 0day article from the upcoming 72 release, +unpublished 71 article, +classics and the Intro by REcon's own Hugo Fortier ❤️
Ekoparty | Hacking everything (@ekoparty) 's Twitter Profile Photo

¿Cómo se conecta el mundo del talento con el mundo hacker? 🚀 Si trabajás liderando equipos de ciberseguridad o Recursos Humanos, te invitamos a Ekoparty Hack the Talent Summit: un encuentro para conectar a quienes diseñan estrategias de talento con quienes lideran equipos de

¿Cómo se conecta el mundo del talento con el mundo hacker? 🚀

Si trabajás liderando equipos de ciberseguridad o Recursos Humanos, te invitamos a Ekoparty Hack the Talent Summit: un encuentro para conectar a quienes diseñan estrategias de talento con quienes lideran equipos de
Erik (@sweriko) 's Twitter Profile Photo

The original art was made by Mark Ferrari in the 80/90s, but you can try it in your browser thanks to this guy: github.com/jhuckaby/canva…

bugcrowd (@bugcrowd) 's Twitter Profile Photo

Okta's new bonus up to $500,000 is a call to action for the hunters who live for high-stakes targets and life-changing payouts 🤯💰 And, it's live NOW! Find critical RCE and SQLi on their core IDaaS platform and claim one of the biggest bonuses of the year:

Okta's new bonus up to $500,000 is a call to action for the hunters who live for high-stakes targets and life-changing payouts 🤯💰

And, it's live NOW! Find critical RCE and SQLi on their core IDaaS platform and claim one of the biggest bonuses of the year:
Bour Abdelhadi (@bourabdelhadi) 's Twitter Profile Photo

Let me share with you while I'm building. I’ve been improving the secret detection across all loaded JS files and managed to reduce false positives a lot. If all goes well, this will ship in the next rep+ release tomorrow or the day after. Stay tuned! Devs will always follow

Let me share with you while I'm building. I’ve been improving the secret detection across all loaded JS files and managed to reduce false positives a lot. If all goes well, this will ship in the next rep+ release tomorrow or the day after. Stay tuned! 

Devs will always follow
Sean Heelan (@seanhn) 's Twitter Profile Photo

Blog post: On the Coming Industrialisation of Exploit Generation with LLMs sean.heelan.io/2026/01/18/on-… TL;DR: I ran an experiment with GPT-5.2 and Opus 4.5 based agents to generate exploits for a zeroday QuickJS bug. They're pretty good at it. Code: github.com/SeanHeelan/ana…