CVE-2009-4028: The vio_verify_callback function in viosslfactories.c in MySQL 5.0.x before 5.0.88 and 5.1.x before 5.1.41,...

Security readout for executives and security teams

CVE-2009-4028 is an old MySQL SSL certificate validation flaw. Certain MySQL 5.0 and 5.1 releases could accept an invalid certificate chain condition, letting a network man-in-the-middle impersonate an SSL-protected MySQL server. Risk matters mainly where legacy MySQL clients connect over untrusted networks. Exposure is likely limited to legacy MySQL 5.0/5.1 deployments or vendor packages based on those versions, especially where SSL MySQL connections cross untrusted networks. Modern or upgraded MySQL deployments are unlikely to be affected, but inventories should verify version and package lineage. Prioritize if legacy MySQL still supports business-critical systems or traverses shared networks. This is an integrity and confidentiality risk for database connections, not a broad internet worm scenario. If no MySQL 5.0/5.1 remains, urgency is low after verification. Mitigation focus: Upgrade MySQL 5.0.x to 5.0.88 or later where applicable.; Upgrade MySQL 5.1.x to 5.1.41 or later where applicable.; Apply relevant vendor package advisories, including Red Hat or SUSE guidance..

Prepared

Jun 28, 2026, 12:21 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.