PatchTheCVEhaproxy vulnerabilities and fixes
Recent CVEs affecting haproxy, with upgrade or downgrade steps. 1 tracked.
haproxy has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-06-18. Highest priority: CVE-2026-55203 (score 38/100).
- CVE-2026-55203 HIGH 7.5 UPGRADE HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn st
FAQ
How do I fix haproxy vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is haproxy being exploited right now?
None of the tracked haproxy CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which haproxy CVE should I patch first?
CVE-2026-55203 currently ranks highest (38/100): HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn st.