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Jaroslav Lobacevski

Jaroslav Lobacevski

Posts by this author

Application security DNS rebinding attacks explained: The lookup is coming from inside the house!

DNS rebinding attack without CORS against local network web applications. Explore the topic further and see how it can be used to exploit vulnerabilities in the real-world.

Jaroslav Lobacevski

Jaroslav Lobacevski·June 3, 2025

Supply chain security
How to secure GitHub Actions workflows: 4 tips to handle untrusted input and tighten permissions
Researchers from Purdue and NCSU have found a large number of command injection vulnerabilities in the workflows of projects on GitHub. Follow these four tips to keep your GitHub Actions workflows secure.Jaroslav Lobacevski, Kevin BackhouseAugust 9, 2023
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Security
How to identify and fix overly powerful GitHub Actions permissions using workflow monitoring
Introducing a new tool to monitor and control the permissions of the repository token for GitHub Actions.Jaroslav LobacevskiJune 26, 2023
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Application security
Validate all the things: improve your security with input validation!
If there’s one habit that can make software more secure, it’s probably input validation. Here’s how to apply OWASP Proactive Control C5 (Validate All Inputs) to your code.Jaroslav LobacevskiMarch 21, 2022
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Vulnerability research
The grey area of software security: Whose responsibility is it?
Security is a complex area. One software component may break the assumptions made by another component and it is not always clear who should fix the code to remediate the security implications.Jaroslav LobacevskiSeptember 23, 2020
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Jaroslav Lobacevski - The GitHub Blog