CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2020-27847
Critical (9.8) in linuxfoundation dex. EPSS 1.7% chance of exploitation in the next 30 days. Fixed in github.com/dexidp/dex 2.27.0.
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.
Severity
- EPSS
- 1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
- CWE
- CWE-228
- Published
- Modified
- Record from
- the NVD, synced
Affected
- linuxfoundation:dex
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-2x32-jm95-2cpx | Go | github.com/dexidp/dex | <2.27.0 | 2.27.0 |
| GHSA-m9hp-7r99-94h5 | Go | github.com/dexidp/dex | <2.27.0 | 2.27.0 |
| GHSA-m9hp-7r99-94h5 | Go | github.com/russellhaering/goxmldsig | <1.1.0 | 1.1.0 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1907732
- https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5
- https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/
- https://bugzilla.redhat.com/show_bug.cgi?id=1907732
- https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5