Navigating 2026 Job Market with Publicly Built Security Lab

Cybersecurity researchers have disclosed details of a critical security vulnerability impacting GitHub.com and GitHub Enterprise Server that could allow an authenticated user to obtain remote code execution with a single "git push" command. The flaw, tracked as CVE-2026-3854 (CVSS score: 8.7), is a case of command injection that could allow an attacker with push access to a repository to achieve remote code execution on the instance. #Cybersecurity #InformationSecurity #remote #code #execution #Server #Systems #Authentication

🚨 A critical RCE vulnerability in GitHub (CVE-2026-3854), discovered by Wiz researchers, allows remote code execution via a single malicious Git push. GitHub.com was silently patched within hours but organizations running self-hosted GitHub Enterprise must confirm their version is updated. For teams using GitHub in CI/CD or development workflows, this is a supply chain risk you cannot ignore. #cybersecurity #GitHub #RCE #SupplyChainSecurity #CISO

🔐 Just published a new CTF write-up + added it to my cybersecurity portfolio. I worked on a picoCTF challenge where the goal was to reverse a series of Linux transformations — not by guessing, but by logically undoing each step. 💡 Key takeaway: Most CTF problems aren’t about complexity — they’re about understanding the process and reversing it correctly. In this challenge, I used: Base64 decoding String reversal Character substitution (tr) ROT13 transformation …and combined everything into a single pipeline. 📖 Read the full breakdown here: https://lnkd.in/gUHrt5w7 💻 GitHub portfolio (with structured write-ups): https://lnkd.in/g4Vus_8p 🚀 Currently focusing on: Web Exploitation Networking (CCNA) Building hands-on security skills through CTFs If you're into cybersecurity or CTFs, let’s connect or discuss 🔍 #CyberSecurity #CTF #picoCTF #Linux #EthicalHacking #Networking #LearningInPublic

One of the more interesting GitHub Advanced Security updates I’ve seen recently is the addition of deployment context directly into repository properties and security alerts. You can now see which repos are actually deployed, where they’re running, and tie that back to the alerts you’re looking at without having to piece it together yourself. That changes the conversation a bit. Not every alert carries the same weight, but most tools still treat them that way. When you can quickly tell what’s tied to something live in production versus something sitting idle, prioritization gets a lot more practical. For anyone who cares about getting better signal out of their security alerts, this is a meaningful step forward. Having that extra layer of context makes it easier to focus on what actually matters and move faster when it counts. https://lnkd.in/en56tbSK

🚀 Built My Own Auto Network Defense System! I recently developed a hands-on cybersecurity project focused on detecting and preventing SSH brute-force attacks in real time. 🔐 Key Highlights: • Performed reconnaissance using Nmap • Simulated brute-force attacks using Hydra (Kali Linux) • Developed a Bash script for real-time log monitoring • Automatically blocked attacker IPs using iptables • Implemented auto-unblock mechanism • Verified network traffic using Wireshark 📊 Result: Successfully detected and blocked unauthorized access attempts dynamically, preventing brute-force attacks in real time. 🧠 What I Learned: • Complete attack lifecycle (Reconnaissance → Exploitation → Defense) • Practical usage of Linux security tools • Log analysis and real-time monitoring • Network traffic analysis and packet inspection 🛠️ Tools & Technologies: Kali Linux | RedHat Linux | Nmap | Hydra | Bash | iptables | Wireshark 🚀 Future Improvements: • Integrate alert system (email/notification) • Build a simple dashboard for monitoring attacks • Extend detection to other services (FTP, HTTP) • Integrate with SIEM tools for enterprise-level security 🔗 GitHub Repository: https://lnkd.in/g-TS9sn8 This project strengthened my understanding of both offensive (CEH) and defensive (SOC) cybersecurity domains. #CyberSecurity #EthicalHacking #Nmap #Wireshark #Linux #SOC #CEH #GitHub #NetworkSecurity

“Cybersecurity researchers have disclosed details of a critical security vulnerability impacting GitHub.com and GitHub Enterprise Server that could allow an authenticated user to obtain remote code execution with a single "git push" command.    The flaw, tracked as CVE-2026-3854 (CVSS score: 8.7), is a case of command injection that could allow an attacker with push access to a repository to achieve remote code execution on the instance.    "During a git push operation, user-supplied push option values were not properly sanitized before being included in internal service headers," per a GitHub advisory for the vulnerability. "Because the internal header format used a delimiter character that could also appear in user input, an attacker could inject additional metadata fields through crafted push option values."    Google-owned cloud security firm Wiz has been credited with discovering and reporting the issue on March 4, 2026, with GitHub validating and deploying a fix to GitHub.com within two hours.”    A critical GitHub vulnerability, CVE-2026-3854, could allow an authenticated user with repository push access to achieve remote code execution using a single git push command. The flaw came from improperly sanitized push options being passed into GitHub’s internal service headers, allowing attackers to inject metadata and potentially execute commands. GitHub patched GitHub.com within two hours, while Enterprise Server users must update to fixed versions.    The issue is serious because GitHub sits at the center of many software supply chains. Even though there is no evidence of malicious exploitation, affected organizations should patch GitHub Enterprise Server immediately, review repository access, and monitor unusual push activity. This case shows how small internal protocol assumptions can create major platform-level risks.    https://lnkd.in/gsaJzRsG #GitHubSecurity #RCE #SupplyChainSecurity #CyberSecurity #CyberCrime #Cybertronium #CybertroniumMalaysia 

Critical GitHub RCE bug exposed millions of repositories A critical command injection flaw in GitHub's server-side git push processing pipeline, tracked as CVE-2026-3854, carried a CVSS score of 8.8 and was patched in Enterprise Server versions 3.14.25 through 3.20.0. The vulnerability resided in an internal component called X-STAT, where crafted push requests could inject arbitrary commands into backend execution. On GitHub.com, this enabled remote code execution on shared storage nodes with access to millions of public and private repositories across tenant boundaries. For self-hosted Enterprise Server deployments, the flaw permitted full server compromise including all repositories and internal secrets. Wiz researchers disclosed that 88% of internet-facing Enterprise Server instances remained unpatched at the time of public disclosure, despite GitHub releasing fixes within hours of the report on March 4, 2026. The finding is notable for its reported use of AI-augmented reverse engineering tooling, IDA MCP, in identifying the vulnerability within closed-source binaries. GitHub's CISO Alexis Wales confirmed the bug earned one of the highest rewards in the company's Bug Bounty programme. This cross-tenant exposure on shared infrastructure brings into light what repository access logs GitHub retains and whether those logs would support attribution of any actual exploitation prior to the March 2026 patch window. #cybersecurity #australiancybersecurity #aics #github #rce #cve20263854 #commandinjection #bugbounty Wiz GitHub Australian Institute of Cyber Security (AICS) https://lnkd.in/gXwZzUmP

Critical GitHub RCE bug exposed millions of repositories A critical command injection flaw in GitHub's server-side git push processing pipeline, tracked as CVE-2026-3854, carried a CVSS score of 8.8 and was patched in Enterprise Server versions 3.14.25 through 3.20.0. The vulnerability resided in an internal component called X-STAT, where crafted push requests could inject arbitrary commands into backend execution. On GitHub.com, this enabled remote code execution on shared storage nodes with access to millions of public and private repositories across tenant boundaries. For self-hosted Enterprise Server deployments, the flaw permitted full server compromise including all repositories and internal secrets. Wiz researchers disclosed that 88% of internet-facing Enterprise Server instances remained unpatched at the time of public disclosure, despite GitHub releasing fixes within hours of the report on March 4, 2026. The finding is notable for its reported use of AI-augmented reverse engineering tooling, IDA MCP, in identifying the vulnerability within closed-source binaries. GitHub's CISO Alexis Wales confirmed the bug earned one of the highest rewards in the company's Bug Bounty programme. This cross-tenant exposure on shared infrastructure brings into light what repository access logs GitHub retains and whether those logs would support attribution of any actual exploitation prior to the March 2026 patch window. #cybersecurity #australiancybersecurity #aics #github #rce #cve20263854 #commandinjection #bugbounty Wiz GitHub Australian Institute of Cyber Security (AICS) https://lnkd.in/g8aexjpm

For three years now, I’ve been tracking how the top 10k GitHub repositories handle their Action dependencies. What started as a way to gather hard data for a talk on GitHub Actions security in 2024 has turned into an annual pulse-check on our industry's progress—or lack thereof. The numbers for 2026 are finally in, and they tell a story of slow but accelerating change: 2024 (2%): When I first ran the scan, supply chain security for CI/CD felt like a niche concern. Most teams were comfortable relying on mutable tags, assuming "v1" would always be what the author intended. 2025 (3%): Awareness grew slightly after the tj-actions/changed-files compromise, which demonstrated how a single malicious tag could exfiltrate secrets from thousands of downstream environments. 2026 (7%): This year, we’ve seen the needle move more significantly. The recent TeamPCP attacks targeting trusted tools like Trivy and KICS served as a massive wake-up call. Because these attackers poisoned existing version tags, the only projects that remained truly safe were those pinning by immutable commit hashes. A jump to 7% is progress, but it also means 93% of the world's top repositories are still potentially one compromised tag away from a breach. I’ve updated the data and year-over-year trends on my site. You can check it out here: https://lnkd.in/euJHf74F A common feedback point I get is that "just pinning won't solve our problems", and I fully agree with that statement. Therefore I expanded the analysis significantly for 2026. I will share the full results later this week! #GitHubActions #SupplyChainSecurity #DevSecOps #OpenSource #SecurityResearch

🚀Day 3 : I spent time strengthening my understanding of Linux fundamentals and log analysis, and I started seeing how system activities can be monitored and analyzed in real-world environments. Instead of viewing Linux commands and logs separately, I began to understand them as a connected workflow used in SOC operations for detecting and investigating security events. Key learnings: ◆ Basic Linux commands like ls, pwd, cd, and cat for system navigation and file handling ◆ Exploring system directories such as /var/log to access important logs ◆ Understanding system logs (syslog) and authentication logs (auth.log) ◆ Using grep to filter logs and identify failed login attempts ◆ Recognizing patterns in logs to detect suspicious activities like brute force attacks Being part of Cyber Intelligence Corps - C I C – supported by TECHNICAL EDUCATION COUNCIL is helping me gain practical clarity on how Linux and log analysis are used in real-world cybersecurity and SOC environments. Still learning, still improving — one step at a time. 📂 GitHub Repository: https://lnkd.in/g_wErHPa #CyberSecurity #Linux #SOC #LogAnalysis #LearningInPublic #CyberIntelligenceCorps #TechnicalEducationCouncil #TechJourney #InfoSec #CareerGrowth