Application Security
In-depth guides and analysis on application security from the Safeguard engineering team.
490 articles
Regular Expression Denial of Service (ReDoS) explained
ReDoS turns a single crafted string into an exponential-time attack. Here's how catastrophic backtracking works, real CVEs, and how to detect it.
Zip Slip vulnerability cheat sheet
A concrete, question-driven cheat sheet on Zip Slip: how the archive-extraction path traversal bug works, real CVEs, and how to detect and fix it.
Preventing path traversal (directory traversal) attacks
Path traversal lets attackers read or write files outside a web app's directory using ../ sequences. Here's how it works and how to stop it.
How to prevent log injection vulnerabilities in Node.js
Log injection lets attackers forge log entries in Node.js apps via unsanitized input. Learn the sanitization, encoding, and structured-logging fixes that stop it.
Preventing open redirect vulnerabilities
Open redirect flaws turn trusted domains into phishing and OAuth-token-theft infrastructure. Here's how they work, how to find them, and how to fix them for good.
Preventing XML external entity (XXE) injection
XXE injection lets attackers read local files, trigger SSRF, or crash servers via XML parsers. Here is how it works and how to shut it down for good.
Python security best practices cheat sheet
A no-fluff cheat sheet of concrete Python security fixes—dependency pinning, pickle/eval risks, PyPI trust signals, and CI gates—with real CVEs and commands.
Software Composition Analysis (SCA) explained: how it fin...
SCA scans your dependency tree against CVE databases to catch vulnerable open-source packages like Log4Shell before they reach production.
10 Java security best practices
10 Java security best practices security teams should enforce across dependency management, deserialization, injection, secrets, and build pipelines.
Reachability Analysis in 2025: Separating Exploitable Vulnerabilities from Noise
Reachability analysis determines whether a vulnerable function is actually called by your application. The technology has matured from research concept to production tool. Here is how it works and where it falls short.
Go security cheat sheet for developers
A practical Go security cheat sheet: the real vulnerability classes, must-patch stdlib CVEs, and dependency scanning tactics developers need to know.
PHP security best practices guide
A practical PHP security best practices guide covering SQL injection, deserialization RCE, upload hardening, dependency risk, and real exploited CVEs like CVE-2024-4577.
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