{"cve":"CVE-2017-11427","nvd":{"published":"2019-04-17T14:29:00.247","modified":"2026-06-17T01:01:47.823","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-287"],"references":["https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations","https://www.kb.cert.org/vuls/id/475445","https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations","https://www.kb.cert.org/vuls/id/475445"],"products":["onelogin:pythonsaml"],"source":"nvd","synced_at":"2026-10-19T20:56:19.218283075+00:00"},"epss":{"cve":"CVE-2017-11427","score":0.04368,"percentile":0.91265,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-j8j8-348v-wfm3","url":"https://osv.dev/vulnerability/GHSA-j8j8-348v-wfm3","summary":"Python-saml allows manipulation of SAML data without invalidation of cryptographic signature","modified":"2024-10-25T21:25:35.106871Z","packages":[{"ecosystem":"PyPI","name":"python-saml","purl":"pkg:pypi/python-saml","ranges":["<2.4.0"],"fixed":["2.4.0"]}]},{"id":"PYSEC-2019-198","url":"https://osv.dev/vulnerability/PYSEC-2019-198","summary":"","modified":"2023-11-08T03:58:49.295677Z","packages":[{"ecosystem":"PyPI","name":"python-saml","purl":"pkg:pypi/python-saml","ranges":["<2.4.0"],"fixed":["2.4.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}