The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-6519.json"