HAProxy vs Nginx
Security track record, side by side · HAProxy · Nginx / F5
HAProxy and Nginx are closely matched on tracked security data. Neither has a decisively cleaner record — compare the specific metrics below, and check the exact version you run.
Health score (latest supported)iOur 0–100 score for the newest supported release — higher is healthier. 100/100 100/100
Known CVEs (all time)iTotal tracked CVEs ever recorded. A larger, older, more-scrutinised project tends to have more — context, not a verdict. 6 2
Actively exploited (CISA KEV)iCVEs confirmed exploited in the wild. The strongest real-world signal — fewer is better. 0✓ 1
Critical CVEsiCVSS 9.0–10.0 across tracked history. 0 0
High CVEsiCVSS 7.0–8.9 across tracked history. 3 2✓
Latest supportediNewest release still receiving fixes. 3.4.7 1.31.3
How to read this. This compares historical vulnerability track record from NVD and CISA KEV — not code quality, config, or your deployment. A higher CVE count often reflects a larger codebase, longer history and more security research, not necessarily weaker software. The decisive security question is the version you run — so check it.