Application Security
In-depth guides and analysis on application security from the Safeguard engineering team.
484 articles
AI Writes Code Faster Than You Can Review It. Which Scanner Do You Point at It?
AI-generated code arrives faster than review can absorb and fails in distinct patterns. SAST, DAST, and reachability each catch part of that — and each misses a specific, predictable slice.
Your DAST Scanner Was Built to Crawl Links. Your Application Doesn't Have Any.
Classic DAST discovers attack surface by following hyperlinks. In an estate of APIs and serverless functions there is nothing to crawl, so the scan completes, reports clean, and covers little.
The Average Enterprise Runs 900 APIs. It Can List Maybe 600 of Them.
API attacks are climbing steeply and 87% of organisations reported an incident last year. The root cause is not weak authentication — it is that many production endpoints are on nobody's list.
Polymarket Lost ~$3M Without a Single Smart Contract Bug
On 25–26 June 2026 attackers compromised a third-party vendor and injected malicious code into Polymarket's website frontend, manipulating users into approving fraudulent transactions. Roughly $3M in crypto drained. The smart contracts were never touched. Your client-side dependency tree is production.
Out-of-Bounds Read Vulnerabilities (CWE-125) Explained
How out-of-bounds read vulnerabilities (CWE-125) leak memory instead of crashing programs, why Heartbleed and Cloudbleed happened, and how to catch them in your dependencies.
Finding vulnerable code hidden inside shaded and uber JARs
JFrog found 65% of Log4Shell-affected artifacts embedded raw .class files instead of a jar — invisible to scanners that only read pom.xml metadata.
ESLint rules for detecting Trojan Source (bidi Unicode) attacks in JS/TS
A single invisible Unicode character can flip how code executes versus how it reads on screen. Here's how to configure ESLint to catch it.
Jackson ObjectMapper and the gadget-chain trap: safe polymorphic deserialization
One FasterXML fix in 2017 spawned nearly 30 follow-up CVEs. Here's how Jackson's polymorphic typing enables RCE, and how to configure ObjectMapper safely.
Comparing open-source tools for secure Java code review
SpotBugs checks 400+ bug patterns, Find Security Bugs adds 144 more, and CodeQL needs a full build — no single free Java scanner covers everything.
NoSQL injection prevention in MongoDB and Mongoose
A single unsanitized query key like $ne can bypass authentication in MongoDB apps — two 2024-2025 Mongoose CVEs show the fix is harder than one middleware package.
Inside the Qinglong Scheduler RCE: How Two Auth Bugs Became a Cryptomining Campaign
Two chainable auth-bypass bugs in the Qinglong task scheduler let attackers skip login entirely and mine crypto on victim CPUs — in the wild before a patch existed.
Trojan Source: how Unicode bidi control characters hide malicious code in plain sight
CVE-2021-42574 scored 8.3 CVSS for a bug that isn't a parser flaw at all — it's Unicode's bidirectional text algorithm, weaponized against code review.
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