Should I store access tokens in localStorage or cookies?

HttpOnly Secure cookies with SameSite attributes. localStorage exposes tokens to XSS attacks—once JavaScript injection exists, the token is stolen. HttpOnly cookies can't be accessed by JavaScript, which eliminates an entire attack vector.

What's the right expiration time for access tokens?

Short—15 minutes or less for access tokens. The shorter the expiration, the smaller the window for token theft to matter. Pair short-lived access tokens with longer-lived refresh tokens that are rotated and revoked properly.

Do I need token revocation if tokens expire?

Yes. Users expect to be logged out immediately when they change their password or request a logout. Expiration handles the happy path. Revocation handles the security path—password compromise, suspicious activity, force logout. You need both.

🔒 Security & Privacy

Your Access Tokens Are Probably Broken (And Nobody's Telling You)

Your authentication system is probably leaking tokens right now—you just don't know it yet. Here's what security audits keep finding, and why your team's token strategy is likely incomplete.

Open Source Beat Apr 03, 2026 6 min read 10 views

Diagram showing secure access token lifecycle with proper storage, validation, expiration, and revocation mechanisms in web applications

⚡ Key Takeaways

Most token security failures are predictable: weak validation, localStorage storage, no revocation, and plaintext storage in databases 𝕏
Risk severity isn't static—a moderate token vulnerability becomes critical the moment attackers discover it 𝕏
Real security requires HttpOnly cookies, short expiration times, rotation of refresh tokens, and immediate revocation capabilities 𝕏

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Open Source Beat

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#API security #JWT authentication #OAuth 2.0 #access token security #token storage #web application security

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Originally reported by DZone

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