CVE-2006-6969: Jetty before 4.2.27, 5.1 before 5.1.12, 6.0 before 6.0.2, and 6.1 before 6.1.0pre3 generates predictable se...

Security readout for executives and security teams

Older Jetty releases generated web session IDs using predictable randomness. If an affected Jetty instance protects authenticated users, a remote attacker could guess valid session tokens and impersonate users. The bundle identifies affected versions before Jetty 4.2.27, 5.1.12, 6.0.2, and 6.1.0pre3. No provided source shows active exploitation. Exposure is most likely in legacy Java web applications still running embedded or standalone Jetty before the fixed version lines, especially internet-facing authenticated portals. Modern Jetty deployments are unlikely affected unless pinned to very old branches. Prioritize remediation where legacy Jetty supports customer, employee, or admin logins. The issue can undermine authentication, but urgency depends on confirmed use of affected versions and exposure to untrusted networks. Mitigation focus: Upgrade Jetty to 4.2.27, 5.1.12, 6.0.2, 6.1.0pre3, or later as applicable.; Check Jetty or application vendor guidance for branch-specific upgrade constraints.; Prioritize internet-facing authenticated applications before internal-only services..

Prepared

Jun 29, 2026, 07:36 UTC (UTC+00:00)

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