PatchTheCVEpostfix vulnerabilities and fixes
Recent CVEs affecting postfix, with upgrade or downgrade steps. 1 tracked.
postfix has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-05-04. Highest priority: CVE-2026-43964 (score 29/100).
- CVE-2026-43964 LOW 3.7 UPGRADE Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and proce
FAQ
How do I fix postfix 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 postfix being exploited right now?
None of the tracked postfix CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which postfix CVE should I patch first?
CVE-2026-43964 currently ranks highest (29/100): Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and proce.