CVE-2012-6426: LemonLDAP::NG before 1.2.3 does not use the signature-verification capability of the Lasso library, which a...

Security readout for executives and security teams

LemonLDAP::NG versions before 1.2.3 could trust crafted SAML data without using Lasso signature verification. In SSO environments, that can let a remote attacker bypass intended access controls. The sources do not show active exploitation or a CVSS score, but the business impact can be serious where LemonLDAP::NG protects critical applications. Exposure is most likely in organizations running LemonLDAP::NG before 1.2.3 with SAML-based authentication or authorization flows protecting web applications. Treat this as high priority if LemonLDAP::NG SAML protects important applications. Access-control bypass in SSO can affect multiple downstream systems, even though public severity scoring and exploitation evidence are incomplete. Mitigation focus: Upgrade LemonLDAP::NG to 1.2.3 or later.; Review vendor guidance in the LemonLDAP issue and advisories.; Confirm SAML validation uses Lasso signature verification..

Prepared

Jun 24, 2026, 12:04 UTC (UTC+00:00)

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