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Flask vs Next.js

Security & risk comparison · Updated June 2026

How does Flask compare to Next.js on security, AI-readiness, and total cost of ownership? We scored both across 7 dimensions using NVD/NIST CVE data, GitHub metrics, and our scan of 10M+ sites.

Key finding

Next.js scores 81/100 overall versus Flask's 63/100. Next.js has 25 total CVEs compared to Flask's 30, giving it a smaller vulnerability surface. (Source: WebPulse framework scoring, NVD/NIST, July 2026)

63
Flask
Modern · PYTHON
vs
81
Next.js
Modern · JAVASCRIPT
Dimension-by-dimension breakdown
security Next.js
75
82
Flask
Next.js
performance Tie
65
65
Flask
Next.js
ecosystem Next.js
50
90
Flask
Next.js
ai readiness Next.js
70
88
Flask
Next.js
developer experience Next.js
70
85
Flask
Next.js
market trajectory Next.js
40
85
Flask
Next.js
cost of ownership Next.js
60
75
Flask
Next.js
Security details
Metric Flask Next.js
Total CVEs 30 25
Critical CVEs 3 2
Exploited (KEV) 0 0
CVEs last year 5 8
Avg CVSS 4.8 4.5
Security score 75/100 82/100
Acceptable
Flask

Flask scores 64/100. Verdict: Acceptable.

Recommended
Next.js

Next.js scores 81/100. Verdict: Recommended.

Quick facts
Flask
Category: Backend
Language: PYTHON
First release: 2010
Generation: Modern
Trend: Stable
Market share: 0.5%
Next.js
Category: Fullstack
Language: JAVASCRIPT
First release: 2016
Generation: Modern
Trend: Rising
Market share: 3.5%
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Data sourced from NVD/NIST CVE database, GitHub API, and WebPulse framework scanner. Scores calculated using a 7-dimension model covering security, performance, ecosystem health, AI-readiness, developer experience, market trajectory, and cost of ownership. Updated June 2026.