Is React more secure than Flask?

React has a security score of 80/100 with 20 total CVEs, while Flask scores 75/100 with 30 total CVEs. React has a stronger security posture. Data from NVD/NIST, July 2026.

How many CVEs does React have compared to Flask?

React has 20 total CVEs on record, including 2 critical severity. Flask has 30 total CVEs with 3 critical. React has 0 actively exploited (CISA KEV) vs Flask's 0.

Should I migrate from Flask to React?

React scores 71/100 overall vs Flask's 63/100 across 7 dimensions including security, AI-readiness, and cost of ownership. Both frameworks are viable choices; compare dimensions relevant to your use case.

Which is better for AI-readiness: React or Flask?

React scores 55/100 on AI-readiness while Flask scores 70/100. Flask is better prepared for AI agent interaction. AI-readiness measures structured data support, API availability, and machine-readable output.

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React vs Flask

Security & risk comparison · Updated June 2026

How does React 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

React scores 71/100 overall versus Flask's 63/100. React has 20 total CVEs compared to Flask's 30, giving it a smaller vulnerability surface. (Source: WebPulse framework scoring, NVD/NIST, July 2026)

Dimension-by-dimension breakdown

security React

React

Flask

performance Tie

React

Flask

ecosystem React

React

Flask

ai readiness Flask

React

Flask

developer experience Tie

React

Flask

market trajectory React

React

Flask

cost of ownership Flask

React

Flask

Security details

Metric	React	Flask
Total CVEs	20	30
Critical CVEs	2	3
Exploited (KEV)	0	0
CVEs last year	3	5
Avg CVSS	4.5	4.8
Security score	80/100	75/100

Acceptable

React

React scores 72/100. Verdict: Acceptable.

Acceptable

Flask

Flask scores 64/100. Verdict: Acceptable.

Quick facts

React

Category: Frontend

Language: JAVASCRIPT

First release: 2013

Generation: Modern

Trend: Rising

Market share: 8.0%

Flask

Category: Backend

Language: PYTHON

First release: 2010

Generation: Modern

Trend: Stable

Market share: 0.5%

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More comparisons

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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.