OAuthGuard
High Opportunity 7/10An open-source security middleware and hosted scanning service that continuously audits OAuth implementations for vulnerabilities including redirect URI misconfigurations, insecure token storage patterns, overly broad scopes, and bearer token weaknesses. It integrates into CI/CD pipelines and provides actionable remediation guides, not just alerts. Targeted at security-conscious engineering teams shipping OAuth-protected APIs and SPAs.
Target User
Security engineers and senior backend developers at B2B SaaS companies (10–200 employees) who own the OAuth implementation and are accountable for security audits or SOC 2 compliance
Revenue Model
Open-source core scanner with a hosted dashboard, CI/CD integration, and team collaboration features at $49–$199/month per workspace. Enterprise tier with SSO and custom rule authoring at $500–$2000/month. Sponsorships from security tooling vendors for the OSS project. Realistic mid-scale MRR in the $15K–$60K range.
Differentiator
Unlike generic SAST tools that treat OAuth as one of thousands of rule sets, OAuthGuard is exclusively focused on OAuth/OIDC threat modeling, maps findings directly to PAIN_IDs and CVEs, and provides fix templates — not just line-of-code warnings. Existing tools like Snyk or Semgrep lack OAuth-specific remediation depth.
Score Breakdown
Based on Pain Points
Authorization code and access token leakage through redirect vulnerabilities
8OAuth implementations risk leaking authorization codes via HTTP Referrer headers and access tokens through URL hash fragments. Redirect hijacking vulnerabilities enable account takeover, and optional CSRF state token protection is frequently ignored in implementations.
Overly broad scopes and long-lived access tokens
8Teams define scopes too broadly (e.g., `full_access`, `admin_all`) and issue access tokens valid for hours or days instead of minutes, dramatically increasing the blast radius if a token is stolen.
Insecure token storage in client applications
8Applications store OAuth tokens in `localStorage`, `sessionStorage`, or insecure cookies, exposing them to XSS attacks and other client-side script injection threats.
Complex redirect URI configuration and validation
8Developers must configure redirect URIs precisely and validate them correctly. Misconfigurations or pattern-matching flaws can be exploited for open redirector attacks and credential theft.
Bearer tokens lack cryptographic binding and signature
8OAuth 2.0 removed signature-based security in favor of relying solely on TLS. Bearer tokens are not cryptographically bound to clients, making them inherently less secure if TLS is compromised.
Scope elevation attacks via parameter manipulation
7Client applications or malicious attackers can manipulate the scope parameter during OAuth token exchange to request more permissions than originally authorized. This allows unauthorized access to user data beyond the initial token scope.