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Vulnerability record · CVE-2017-11430 · published 17 April 2019

CVE-2017-11430: Omniauth saml improper authentication vulnerability

Omniauth · Omniauth Saml

OmniAuth OmnitAuth-SAML 1.9.0 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.

9.8 CVSS 3.0 Critical EPSS 2.4% · top 16.5% CWE-287 · Improper authentication
9.8CVSS 3.0 base score, v2 7.5
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

OmniAuth OmnitAuth-SAML 1.9.0 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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations ExploitTechnical DescriptionThird Party Advisory
https://www.kb.cert.org/vuls/id/475445 Third Party AdvisoryUS Government Resource
https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations ExploitTechnical DescriptionThird Party Advisory
https://www.kb.cert.org/vuls/id/475445 Third Party AdvisoryUS Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-11430), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.