NPCI Web and Browser based UPI Security Framework demand robust security amid rising digital payment adoption in India. Recent RBI and NPCI circulars outline critical frameworks to mitigate risks like fraud and unauthorized access.
RBI’s 2FA Framework for Digital Payments
RBI’s RBI/2025-26/219 directions mandate two-factor authentication (2FA) for all digital payment transactions effective April 1, 2026. This applies to UPI, including web interfaces, requiring at least one dynamic factor like OTP or biometrics alongside knowledge-based (PIN) or possession-based elements.
In web browsers, this means Payment Service Providers (PSPs) must integrate secure 2FA flows, preventing replay attacks via dynamic tokens tied uniquely to transactions. Exceptions include small-value contactless payments, but web UPI collections or P2P transfers fully comply, enhancing user trust in browser environments.
Regulated entities face compliance deadlines, with flexibility for customer-chosen factors under DPDP Act privacy rules.
NPCI UPI Circle: Delegated Payments Security
NPCI’s addendum NPCI/UPI/OC-201B/2025-26 extends UPI Circle for secondary users, allowing primary users to delegate payments within limits. For web UPI, this introduces delegated authentication, where primaries approve secondary access via KYC-verified mobile and ID documents.
Security features include explicit consent from secondaries, monthly transaction caps, and PSP system changes by August 2025. Browser implementations must enforce these via secure sessions, preventing unauthorized delegation exploits common in cross-origin web apps.
This feature boosts inclusion for family or dependents but risks phishing in browsers; NPCI mandates issuer bank verification to counter it.
Deactivating Inactive UPI IDs via MNRL
NPCI’s April 2025 addendum on Numeric UPI ID Service requires deactivating UPI IDs linked to inactive Mobile Number Radiation Lists (MNRL) from April 1, 2025. Inactive numbers pose fraud risks when reassigned, so banks unlink dormant UPI handles automatically.
Web UPI users must update active mobiles pre-deadline to avoid service suspension in apps like Google Pay or PhonePe. This ties into browser security by reducing orphaned IDs exploitable via social engineering or session hijacking.
Users should verify bank records and reactivate dormant accounts promptly.
Web & Browser UPI Security Challenges
Browser UPI faces unique threats: XSS, CSRF, and insecure origins bypassing native app sandboxing. NPCI UPI API guidelines (OC-215/2025-26) enforce TPS limits, rate limiting (e.g., 25 linked account views/day), and 3 status checks/transaction at 90-second intervals.
Webviews in hybrid apps amplify risks; guidelines prioritize customer-initiated calls over automated ones during peaks. Positive security controls block out-of-sequence requests, vital for browser UPI QR scans or deep links.
Encryption, allow-listed paths, and bot detection are mandatory.
NPCI API Security Guidelines (OC-215)
NPCI’s OC-215 mandates API throttling, exponential backoff, and dropping redundant requests for UPI endpoints. In web contexts, this prevents DDoS via browser automation or malicious extensions.
Key limits include transaction status polling caps and peak-hour restrictions on non-user APIs. Compliance requires WAAP tools for enforcement, ensuring only valid flows succeed.avantiscdnprodstorage.core.
Audits verify these via OWASP-aligned testing.
Compliance Roadmap for Web UPI Providers
Implement 2FA with WebAuthn for biometrics in browsers. Update UPI Circle delegation with consent UIs and monitor MNRL daily.
Conduct VAPT per NPCI scopes, focusing on web APIs. Roll out by March 2026 to meet RBI effective date.
| Compliance Area | Key Requirement | Web UPI Impact | Deadline |
|---|---|---|---|
| RBI 2FA | Dynamic + static factors | Browser OTP/biometric prompts | Apr 1, 2026 |
| UPI Circle | KYC delegation limits | Secure web consent flows | Aug 31, 2025 |
| Inactive ID Deactivation | MNRL unlinking | Profile update mandates | Apr 1, 2025 |
| API Limits (OC-215) | TPS/rate throttling | Anti-bot browser controls | Ongoing 2025-26 |
CertCube Labs’ Role in UPI Security
As a CERT-In empaneled firm, CertCube Labs Pvt Ltd delivers NPCI/RBI compliance audits for UPI web platforms. Their services include VAPT for APIs, covering OWASP Top 10, rate limiting verification, and UPI-specific risks like delegation flaws.
They conduct pre-audit gap analysis, penetration testing on live-like environments, and remediation for encryption/key management. For web UPI, CertCube tests browser-specific vectors (XSS/CSRF) and issues NPCI-compliant certificates.
End-to-end support minimizes downtime, aiding fintechs/banks in 2026 readiness; they’ve audited UPI, RuPay, IMPS ecosystems. Clients benefit from threat modeling, SOP reviews, and post-audit resilience building.
Best Practices for Secure Web UPI
- Enforce HTTPS Strict Transport Security (HSTS) and Content-Security-Policy (CSP).
- Use PKCE for OAuth in browser UPI logins.
- Implement device binding for 2FA sessions.
- Monitor for anomalous browser fingerprints.
Regular audits by empaneled firms like CertCube ensure adherence.