Security, Auth, and Compliance
Auth, compliance, OWASP, and the security work that enterprise buyers will ask about on day one.
Tenant Aware Authorization: The Mistake That Leaks Data
Missing tenant context in authorization checks is the most common data leakage pattern in multi tenant SaaS. Here is how it happens and how to prevent it.
Security, Auth, and ComplianceSQL Injection in 2026: Still Happening, Still Preventable
SQL injection has been on the OWASP Top 10 for two decades. It is still being exploited. Here is why and how to stop it.
Security, Auth, and ComplianceSOC 2 Type I vs Type II: A Founder's Guide to Both
SOC 2 Type I proves you have the controls. Type II proves they work over time. Here is what each means and when you need them.
Security, Auth, and ComplianceSingle Sign On for Enterprise SaaS: SAML and OIDC Compared
SSO is a procurement requirement for enterprise deals. Here is what SAML and OIDC each mean for your engineering roadmap.
Security, Auth, and ComplianceSession Management for Web Apps: A Modern Take
Session management in web applications encompasses the mechanisms for maintaining authenticated state between client requests. Modern web session management involves two primary approaches: server side sessions (a session ID is stored in a cookie and maps to session state in a database or cache) and token based sessions (a JWT or similar token is issued to the client and validated on each request without server side state). The choice affects scalability, security, invalidation capability, and implementation complexity.
Security, Auth, and ComplianceServer Side Request Forgery: The Quiet Killer in SaaS Integrations
Server Side Request Forgery (SSRF) is a vulnerability where an attacker can cause the server to make HTTP requests to a destination the attacker controls, which may include internal network resources, cloud provider metadata services, or other backend infrastructure not accessible from the public internet. SSRF is particularly dangerous in SaaS products that accept URLs provided by users (webhook endpoints, image imports, integration callbacks, RSS feed fetchers) because the server's network position grants access to resources the attacker cannot reach directly.
Security, Auth, and ComplianceSecrets Management for SaaS: Vault, AWS Secrets Manager, Doppler
Secrets management for SaaS encompasses the systems used to store, distribute, rotate, and audit access to sensitive credentials including database connection strings, API keys, encryption keys, and service tokens. A secrets management system provides: centralized storage with encryption at rest, access controls that restrict which services and environments can read each secret, audit logs of every secret access, and rotation mechanisms that update secrets without manual deployment. The alternatives range from .env files (no management) to HashiCorp Vault (full dynamic secrets infrastructure).
Security, Auth, and ComplianceSCIM Provisioning: The Feature Enterprise Customers Will Demand
SCIM (System for Cross-domain Identity Management) is a standardized protocol that allows enterprise identity providers (Okta, Azure AD, Google Workspace) to automatically create, update, and deactivate user accounts in SaaS applications. When a new employee joins a company, their IT team provisions them in the identity provider, which automatically creates their account in all connected SaaS tools via SCIM. When an employee is offboarded, their accounts across every tool connected via SCIM are deactivated automatically. SCIM is a standard enterprise buying requirement for SaaS products targeting companies with more than 50 employees.
Security, Auth, and ComplianceRight to Be Forgotten: How to Implement It Without Pain
The right to be forgotten (formally 'right to erasure' under GDPR Article 17) gives individuals the right to request deletion of their personal data when it is no longer necessary for the purpose it was collected, when consent is withdrawn, or when the data was processed unlawfully. Implementing this right requires identifying all locations where a user's personal data is stored (database records, backups, logs, analytics, third-party services), deleting or anonymizing the data in each location, and maintaining an audit trail of the deletion request itself without retaining the deleted personal data.
Security, Auth, and CompliancePersonally Identifiable Information in Logs: A Cleanup Playbook
PII (personally identifiable information) in application logs refers to personal data about users or customers that is captured in log entries, including names, email addresses, phone numbers, IP addresses, location data, payment information, and behavioral data that can identify individuals. Logging PII creates compliance obligations under GDPR, CCPA, and other privacy regulations, expands the data subject rights obligations (right to erasure, right of access), and creates security risk if log storage is compromised. Minimizing PII in logs requires auditing existing log content and implementing filtering in the log pipeline.
Security, Auth, and CompliancePenetration Testing for Startups: Cost, Scope, and Cadence
A penetration test (pentest) is a structured security assessment where security professionals attempt to exploit vulnerabilities in a system using the same techniques an attacker would use, within a defined scope and with explicit authorization. For SaaS startups, penetration tests are typically conducted annually or before significant security certifications (SOC 2, ISO 27001) and provide an attacker's perspective on the application's security posture that automated scanning and code review cannot fully replicate.
Security, Auth, and CompliancePCI DSS for SaaS Touching Payments: Patterns to Avoid the Trap
PCI DSS (Payment Card Industry Data Security Standard) is a set of security requirements for organizations that process, transmit, or store payment card data. Compliance scope is determined by the cardholder data environment (CDE): the systems and people who can access cardholder data. The most effective PCI DSS strategy for SaaS products is reducing the CDE to zero by using payment processor tokenization so that card data never touches the application's infrastructure.
Security, Auth, and CompliancePasskeys for SaaS: The Migration Plan
Passkeys are cryptographic credentials that replace passwords for authentication. Each passkey consists of a public key stored on the server and a private key stored on the user's device. Authentication proves possession of the private key using device biometrics or PIN, without transmitting the private key or any shared secret. Passkeys resist phishing because they are bound to the origin (domain) they were created for and cannot be used on lookalike sites. They are part of the WebAuthn (FIDO2) standard.
Security, Auth, and ComplianceOWASP Top Ten for SaaS in 2026
The OWASP Top Ten is a periodically updated list of the ten most critical web application security risks, maintained by the Open Web Application Security Project. Each item represents a category of vulnerability that is both common and impactful. For SaaS products in 2026, the relevant categories include broken access control, cryptographic failures, injection attacks, insecure design, security misconfigurations, and three others that have increased in relevance due to the adoption of APIs, microservices, and AI features.
Security, Auth, and ComplianceMulti Factor Authentication: WebAuthn, TOTP, and Beyond
Multi factor authentication (MFA) requires users to provide two or more types of evidence before accessing an account: something they know (password), something they have (a device generating a code), and something they are (biometrics). TOTP (Time based One Time Passwords) is the most widely deployed second factor. WebAuthn is the modern standard that replaces TOTP with phishing resistant, hardware backed authentication. Passkeys implement WebAuthn for consumer friendly use. Each has different phishing resistance, implementation complexity, and user friction tradeoffs.
Security, Auth, and ComplianceLogging Customer Data: The Privacy Mistakes That Get You Sued
Customer data in application logs is a privacy liability that most engineering teams create accidentally rather than deliberately. Personally identifiable information logged for debugging purposes stays in log storage systems indefinitely, is accessible to everyone with log access, and creates data retention violations under GDPR, CCPA, and similar regulations. The fix is a logging hygiene policy enforced at the instrumentation level, not at the storage level.
Security, Auth, and ComplianceJWT Best Practices in 2026: What Has Changed
JSON Web Tokens (JWTs) are a compact format, safe for use in URLs, for representing claims between two parties. In SaaS authentication, they are used primarily as access tokens and session tokens. The best practices around algorithm selection, token lifetime, key rotation, and revocation have evolved significantly since JWTs became widespread, and many production systems are still running on outdated patterns that create exploitable vulnerabilities.
Security, Auth, and ComplianceISO 27001 for Engineering Founders: A Practical Reading
ISO 27001 is the international standard for information security management systems. It defines a framework for identifying information security risks and implementing controls to manage them. Certification means an accredited third party auditor has verified that your security management system meets the standard's requirements. For SaaS companies, ISO 27001 is the compliance credential that opens European enterprise sales and provides a structured framework for building security practices that scale.
Security, Auth, and ComplianceInsecure Direct Object References: The Bug Founders Underestimate
An Insecure Direct Object Reference (IDOR) is a vulnerability where an application exposes internal object identifiers in URLs or API requests without verifying that the requesting user has permission to access the referenced object. The result is that any user can access any other user's data by guessing or enumerating the identifier. IDOR vulnerabilities are consistently in the OWASP Top 10 and are among the most commonly reported in bug bounty programs.
Security, Auth, and ComplianceIncident Response for Startups: A Playbook
Incident response for a startup is a documented, practiced process for detecting, communicating about, and resolving service disruptions in a way that minimizes customer impact and preserves trust. The goal is not to prevent all incidents. It is to handle them in a way that customers and prospects find credible and that the team finds manageable.
Security, Auth, and ComplianceHow to Sell to Enterprise Without a Full Compliance Stack
Selling to enterprise without a full compliance stack means earning trust through operational security, transparent communication, and the specific controls that the buyer's security team will actually check in the first conversation. Most early stage SaaS companies that win enterprise deals do not have a complete compliance posture. They have the right twelve controls and a credible roadmap for the rest.
Security, Auth, and ComplianceHIPAA Compliance for Health SaaS: The Real Engineering Lift
HIPAA compliance for a health SaaS is the engineering and operational work required to handle protected health information legally and safely. The Business Associate Agreement with healthcare customers is the formal commitment. The engineering work supports the commitment. Encryption, audit logging, access controls, breach handling, and vendor management are the surfaces. The work is real but bounded. Most health SaaS can reach HIPAA readiness in three to six months.
Security, Auth, and ComplianceGDPR for SaaS Builders: What You Must Have on Day One
GDPR is the EU regulation that governs personal data of EU residents. Any SaaS with EU users has to comply regardless of where the company is based. The minimum is concrete. A privacy policy. A lawful basis for processing. Data subject rights implementation. A data processing agreement. A vendor inventory. A breach notification process. Each is small. The retrofit if you skipped it is a quarter of work.
Security, Auth, and ComplianceEncryption at Rest vs in Transit: What Customers Will Ask
Encryption at rest protects data stored on disk from being read if the storage is compromised. Encryption in transit protects data being moved across the network from being read if the connection is intercepted. Both are now table stakes for B2B SaaS in 2026. The implementations are straightforward. The teams that have not implemented either are usually the teams that have not been through an enterprise security review yet.