CVE-2015-0851: XMLTooling-C before 1.5.5, as used in OpenSAML-C and Shibboleth Service Provider (SP), does not properly ha...

Security readout for executives and security teams

This flaw can crash affected Shibboleth-related SAML components when they process malformed XML. The likely business impact is authentication service disruption, not confirmed data theft or code execution. It matters most where Shibboleth Service Provider or OpenSAML-C supports login flows for critical applications. Exposure is likely limited to systems running XMLTooling-C before 1.5.5 through OpenSAML-C or Shibboleth Service Provider, especially internet-facing SAML endpoints. Prioritize remediation for SSO infrastructure exposed to untrusted SAML/XML traffic. This is mainly an availability risk, but outages in identity services can block access to many dependent business applications. Mitigation focus: Upgrade XMLTooling-C to 1.5.5 or later where applicable.; Apply vendor or distribution fixed packages, including Debian guidance if relevant.; Update dependent OpenSAML-C or Shibboleth SP packages using XMLTooling-C..

Prepared

Jun 13, 2026, 22:22 UTC (UTC+00:00)

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