CVE-2017-11427: Onelogin Pythonsaml

Critical severity, CVSS 9.8. EPSS: 4.7% chance of exploitation in the next 30 days.

OneLogin PythonSAML 2.3.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.

Affected products

• Onelogin Pythonsaml: up to and including 2.3.0

Published 2019-04-17. Last modified 2026-06-17.