Industry Analysis
In-depth guides and analysis on industry analysis from the Safeguard engineering team.
100 articles
Path Traversal Prevention in Ruby with File.realpath
How File.realpath stops path traversal in Ruby apps, why File.expand_path alone fails, and what real CVEs like Sprockets' CVE-2018-3760 reveal about secure file handling.
Path Traversal Prevention in Rust with fs::canonicalize
fs::canonicalize resolves `..` and symlinks into one absolute path, but it can't fix TOCTOU races, missing files, or Windows prefix quirks on its own. Here's the safe pattern.
Path Traversal Prevention in C++ with std::filesystem::we...
Why std::filesystem::weakly_canonical alone doesn't stop path traversal in C++, and the containment check every extraction, upload, or plugin loader needs beside it.
XXE Prevention in Ruby with Nokogiri NONET/NOENT
Nokogiri wraps libxml2, and one misconfigured parse call can leak local files or trigger SSRF. Here's how NONET and NOENT actually work, and how to lock them down.
XXE Prevention in JavaScript: Disabling libxmljs noent
How the libxmljs noent option silently reopens XML External Entity (XXE) attacks in Node.js apps, and the exact parser settings that shut it down for good.
XXE Prevention in C++: Removing libxml2 XML_PARSE_NOENT
How the libxml2 XML_PARSE_NOENT flag enables XXE in C++ codebases, the real CVEs behind it, and the exact code changes needed to remove it safely.
XXE Prevention in Python with resolve_entities=False
Why lxml's XMLParser resolves external entities by default, how resolve_entities=False actually stops XXE, and where Python teams still leave file-read and SSRF paths open.
XXE Prevention in Java: Hardening DocumentBuilderFactory
Java's DocumentBuilderFactory parses XML with external entities on by default, turning XML uploads into file-read and SSRF vectors. Here is how to lock it down.
XXE Prevention in C# by Disabling XmlResolver/DTD Processing
XXE in C# lives at the XmlResolver and DtdProcessing settings. Here's how .NET's defaults evolved since 2014 and exactly how to lock down XmlDocument, XmlTextReader, and XmlReaderSettings.
XXE Prevention in Go with decoder.DisallowDTD
Go's standard XML parser resists classic XXE by design, but cgo bindings and SAML libraries can reopen it. Here's how the DisallowDTD pattern closes the gap.
XXE Prevention in PHP with libxml_disable_entity_loader
libxml_disable_entity_loader() looked like the fix for XXE in PHP, but PHP 8.0 deprecated it. Here's what it did, why it broke, and what to use now.
Insecure Deserialization Prevention in Java with Deserial...
Java deserialization RCEs still hit production years after JEP 290 shipped filters. Here's how JEP 290/415 filters work, common rollout mistakes, and how Safeguard closes the gaps.
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