CVE-2019-3465: Debian Linux

High severity, CVSS 8.8. EPSS: 3% chance of exploitation in the next 30 days.

Rob Richards XmlSecLibs, all versions prior to v3.0.3, as used for example by SimpleSAMLphp, performed incorrect validation of cryptographic signatures in XML messages, allowing an authenticated attacker to impersonate others or elevate privileges by creating a crafted XML message.

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Simplesamlphp Simplesamlphp: up to and including 1.17.6
• Xmlseclibs Project Xmlseclibs: from 1.0.0, up to and including 1.4.2; from 2.0.0, up to and including 2.1.0; from 3.0.0, up to and including 3.0.3

Published 2019-11-07. Last modified 2026-06-17.