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Eleventy vs Flask

Security & risk comparison · Updated June 2026

How does Eleventy 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

Eleventy scores 70/100 overall versus Flask's 63/100. Eleventy has 1 total CVEs compared to Flask's 30, giving it a smaller vulnerability surface. (Source: WebPulse framework scoring, NVD/NIST, July 2026)

70
Eleventy
Modern · JAVASCRIPT
vs
63
Flask
Modern · PYTHON
Dimension-by-dimension breakdown
security Eleventy
95
75
Eleventy
Flask
performance Tie
65
65
Eleventy
Flask
ecosystem Flask
45
50
Eleventy
Flask
ai readiness Eleventy
86
70
Eleventy
Flask
developer experience Flask
60
70
Eleventy
Flask
market trajectory Flask
20
40
Eleventy
Flask
cost of ownership Eleventy
90
60
Eleventy
Flask
Security details
Metric Eleventy Flask
Total CVEs 1 30
Critical CVEs 0 3
Exploited (KEV) 0 0
CVEs last year 0 5
Avg CVSS 2.5 4.8
Security score 95/100 75/100
Acceptable
Eleventy

Eleventy scores 70/100. Verdict: Acceptable.

Acceptable
Flask

Flask scores 64/100. Verdict: Acceptable.

Quick facts
Eleventy
Category: Ssg
Language: JAVASCRIPT
First release: 2018
Generation: Modern
Trend: Rising
Market share: 0.05%
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.