CVE-2020-27847: Linuxfoundation Dex

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

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.

Affected products

• Linuxfoundation Dex: before 2.27.0 (fixed in 2.27.0)

Published 2021-05-28. Last modified 2026-06-17.