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Spring Boot vs Flask

Security & risk comparison · Updated June 2026

How does Spring Boot compare to Flask 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

Spring Boot scores 65/100 overall versus Flask's 63/100. Spring Boot has 250 total CVEs compared to Flask's 30, though its larger ecosystem contributes to a higher CVE count. (Source: WebPulse framework scoring, NVD/NIST, July 2026)

65
Spring Boot
Modern · JAVA
vs
63
Flask
Modern · PYTHON
Dimension-by-dimension breakdown
security Flask
55
75
Spring Boot
Flask
performance Tie
65
65
Spring Boot
Flask
ecosystem Spring Boot
72
50
Spring Boot
Flask
ai readiness Spring Boot
80
70
Spring Boot
Flask
developer experience Tie
70
70
Spring Boot
Flask
market trajectory Spring Boot
65
40
Spring Boot
Flask
cost of ownership Tie
60
60
Spring Boot
Flask
Security details
Metric Spring Boot Flask
Total CVEs 250 30
Critical CVEs 25 3
Exploited (KEV) 3 0
CVEs last year 30 5
Avg CVSS 6.0 4.8
Security score 55/100 75/100
Acceptable
Spring Boot

Spring Boot scores 66/100. Verdict: Acceptable.

Acceptable
Flask

Flask scores 64/100. Verdict: Acceptable.

Quick facts
Spring Boot
Category: Backend
Language: JAVA
First release: 2014
Generation: Modern
Trend: Rising
Market share: 2.0%
Flask
Category: Backend
Language: PYTHON
First release: 2010
Generation: Modern
Trend: Stable
Market share: 0.5%
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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.