SECURITY RESEARCH // 2026

AI SECURITY &
COMPLIANCE GUIDES

Deep research on OWASP LLM Top 10, EU AI Act obligations, NIST AI RMF, prompt injection, and developer-native security posture — written by engineers, for engineers.

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Featured Article
CybersecurityNEWApril 24, 2026·11 min read

Next.js Security Checklist for Startups: Auth, Server Actions, Vercel, and API Routes

Next.js gives you speed, not a finished security model. These are the App Router, Vercel, and route-handler controls that actually stop startup breaches before they turn into customer incidents.

Next.js App RouterVercel SecurityBroken Access Control
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by Snyk · Semgrep · SonarCloud
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Cybersecurity Articles
Cybersecurity11 min read

Next.js Security Checklist for Startups: Auth, Server Actions, Vercel, and API Routes

Next.js ships fast. It also makes it easy to leak secrets into the client, skip ownership checks in route handlers, and overtrust server actions. This is the practical checklist for startup teams shipping on Vercel.

Next.js App RouterVercel SecurityBroken Access Control
April 24, 2026Read →
Cybersecurity10 min read

Series A Security Checklist for Startups: What CTOs Need Before Due Diligence

If you are raising, selling into mid-market, or answering customer security questionnaires, this is the short list that matters: access control, logging, secrets, backup evidence, vulnerability scans, and incident readiness.

Due DiligenceSecurity QuestionnaireEvidence
April 23, 2026Read →
Cybersecurity9 min read

IDOR Vulnerabilities in SaaS Apps: The Broken Access Control Bug That Breaches Startups

One missing userId filter can expose every customer account in your SaaS. Here is how IDOR happens in modern CRUD backends and the exact query pattern that stops it.

OWASP A01AuthorizationSaaS APIs
April 22, 2026Read →
Cybersecurity10 min read

Multi-Tenant Isolation Security for SaaS Startups: Prevent Cross-Customer Data Leaks

True multi-tenant security is not just a tenantId column. You need isolation in queries, caches, storage, background jobs, analytics, and search indexes.

Tenant IsolationB2B SaaSData Boundaries
April 21, 2026Read →
Cybersecurity10 min read

Secrets Management for Startups: Stop Shipping .env Files and Hardcoded Keys

Most startup breaches start with a key in code, logs, CI, or frontend bundles. This guide covers the full lifecycle: generate, store, rotate, scope, audit, and delete.

Secrets HygieneKey RotationCI Security
April 20, 2026Read →
Cybersecurity9 min read

SSRF Vulnerabilities in Next.js and Node.js: How Startups Expose Internal Services

Link previews, importers, webhook fetchers, and AI URL tools all create SSRF risk. One raw fetch() on user input can hand attackers your cloud metadata and internal APIs.

SSRFCloud MetadataURL Fetch
April 19, 2026Read →
Cybersecurity10 min read

API Rate Limiting for Startups: Prevent Brute Force, Abuse, and AI Cost Spikes

Rate limiting is not a nice-to-have. It is the difference between an annoying bot and a breach, an outage, or a surprise OpenAI invoice.

Rate LimitingBrute ForceAI Spend
April 18, 2026Read →
Cybersecurity9 min read

JWT Security for Startups: 9 Mistakes That Turn Auth Into an Incident

Most JWT problems are not exotic cryptography. They are operational mistakes: decode without verify, weak secrets, long expiry, no audience checks, and browser storage mistakes.

JWT SecurityAuthSession Design
April 17, 2026Read →
Cybersecurity10 min read

Penetration Testing for Startups: When You Need It, What It Costs, and What to Fix First

Most startups buy pentests too early or too late. This guide explains when an automated scanner is enough, when buyers or insurers force a pentest, what it costs, and how to prepare.

Penetration TestingBudgetReadiness
April 15, 2026Read →
Cybersecurity8 min read

We Scanned Supabase and It Scored 100/100 — Here's What Perfect Security Looks Like

Supabase powers 1M+ databases. We ran a full security scan across 628 files — auth, data protection, secrets, injection, logging, AI governance — and found zero vulnerabilities. Here's every practice they got right.

OWASP Top 10Clean ScanSecurity Posture
April 8, 2026Read →
Cybersecurity9 min read

How rollup@4.39.0 Turns Your CI Pipeline Into a Secret Vault Leak

GHSA-mw96-cpmx-2vgc in rollup@4.39.0 enables prototype pollution during builds, exposing CI secrets. Learn the attack chain and how to fix it now.

OWASP A06:2021CWE-1035CWE-1321
April 7, 2026Read →
Cybersecurity9 min read

7 Active CVEs in One Fastify Dependency: The Silent Supply-Chain Threat

node-forge@1.3.1 ships 7 GHSA advisories into your Fastify app. Learn how prototype pollution chains to full validation bypass — and how to fix it in CI.

OWASP A06:2021CWE-1035CWE-937
April 7, 2026Read →
Cybersecurity9 min read

3 Open Advisories in Elysia's Deps That Can DoS Your API

file-type@20.4.1 and valibot@1.1.0 carry 3 open GHSA advisories enabling ReDoS, heap reads, and schema bypass. Learn to fix and prevent this in Elysia.

OWASP A06:2021CWE-937CWE-1035
April 7, 2026Read →
Cybersecurity9 min read

Mutable GitHub Actions Tags: The Supply Chain Backdoor in Your CI

A single mutable @v3 tag can let attackers execute code in your CI pipeline and steal npm tokens. Learn how to pin actions to commit SHAs and prevent it.

OWASP A06:2021CWE-829NIST SI-7
April 7, 2026Read →
Cybersecurity9 min read

6 CVEs in Hono's Dependency Chain: The Invisible Supply Chain Risk

Undici request smuggling and 5 more CVEs in Hono's dependency graph expose thousands of Cloudflare Workers apps. Learn to detect and fix them before attackers do.

OWASP A06:2021CWE-1035CWE-1104
April 7, 2026Read →
Cybersecurity9 min read

The 'superSecret' JWT Backdoor Hiding in Plain Sight

A hardcoded JWT fallback secret lets attackers forge admin tokens in 90 seconds. Learn how this CWE-798 flaw works and how to fix it permanently. Scan your repo now.

OWASP A07:2021CWE-798NIST AC-2
April 6, 2026Read →
Cybersecurity7 min read

API Key Exposed in Your Code? Here's Exactly What To Do

Found a secret committed to your repo? Rotate first, then follow the 5-step response playbook: audit git history, scan for more secrets, fix your .gitignore, and prevent it with CI scanning.

Secrets ExposureIncident ResponseGit History Audit
April 2, 2026Read →
Cybersecurity11 min read

Pre-Launch Security Checklist for Solo Developers and Indie Hackers

The 15-item security checklist written for solo founders launching next week — not a Fortune 500 security team. Custodia automates 11 of 15. In priority order.

Pre-LaunchOWASP Top 10Secrets & Auth
April 2, 2026Read →
Cybersecurity10 min read

OWASP Top 10 Code Review Guide: How to Find SQL Injection, Broken Access Control & XSS in Your Codebase

Manual code reviews miss 60% of OWASP Top 10 vulnerabilities. This guide covers the exact patterns to look for in Node.js, Python, and Go — plus how to automate detection so nothing slips to production.

SQL InjectionBroken Access ControlXSS
March 26, 2026Read →
Cybersecurity8 min read

Vibe Coding Security Risks: What Cursor and Claude Can't Catch

AI editors ship working code — not audited code. Vibe-coded projects consistently contain 4 vulnerability classes: hardcoded secrets, prompt injection, broken access control, and insecure output handling. Here's how to find them.

Hardcoded SecretsPrompt InjectionBroken Access Control
April 7, 2026Read →
Cybersecurity9 min read

Is AI Generated Code Secure? What We Found Scanning Real Projects

AI generated code is not inherently insecure — but it is systematically undertested for security before it ships. After scanning AI-generated projects, the same 4 vulnerability classes appear in almost every codebase.

AI Code SecurityOWASP LLM01Broken Access Control
April 14, 2026Read →
Cybersecurity10 min read

The AI Data Breaches Developers Need to Know About: Samsung, Slack, and the Real Incidents

Samsung engineers leaked source code into ChatGPT. Slack AI got weaponized through a DM. A Bing chatbot revealed its secret identity. These aren't hypotheticals — they all happened, and every one has a direct lesson for developers building AI products today.

Data ExfiltrationPrompt InjectionSystem Prompt Leak
April 1, 2026Read →
Cybersecurity9 min read

How GitHub Secured Copilot for 77,000 Companies: The Architecture You Never Knew Existed

To get enterprise buy-in, GitHub had to solve problems no developer tool had faced before: cross-tenant code leakage, licensing liability, secret suggestion prevention, and full audit logging. Here's how they actually built it — and what it still can't do.

Data IsolationSecrets PreventionAudit Logging
April 1, 2026Read →
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