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CVE-2020-27847

CRITICAL
9.8
CVSS Score
Published: May 28, 2021 at 10:20 AM UTC
Updated: June 17, 2026 at 03:09 AM UTC
1 product affected across 1 vendorDex

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Severity
CRITICAL9.8
Exploit prediction
EPSS 2%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Dex· Linuxfoundation
95%
v < 2.27.02.27.0
Affected range stops below 2.27.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1907732
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5
x_refsource_MISCVendor Advisory
Source: [email protected]
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-228

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