CVE-2020-27847

A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature Validation. This flaw allows an attacker to bypass SAML authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw affects dex versions before 2.27.0.

• CWE-228

• https://bugzilla.redhat.com/show_bug.cgi?id=1907732Issue Tracking, Third Party Advisory
• https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5Patch, Third Party Advisory
• https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1907732Issue Tracking, Third Party Advisory
• https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5Patch, Third Party Advisory
• https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/Vendor Advisory

Published

May 28, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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