CVSS 3.1
9.6 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:HCVE-2020-26290
Critical (9.6) in linuxfoundation dex. EPSS 1.0% chance of exploitation in the next 30 days. Fixed in github.com/dexidp/dex 2.27.0.
Dex is a federated OpenID Connect provider written in Go. In Dex before version 2.27.0 there is a critical set of vulnerabilities which impacts users leveraging the SAML connector. The vulnerabilities enables potential signature bypass due to issues with XML encoding in the underlying Go library. The vulnerabilities have been addressed in version 2.27.0 by using the xml-roundtrip-validator from Mattermost (see related references).
Severity
- EPSS
- 1.0% chance of exploitation in the next 30 days; higher than 62% of CVEs (scores of 2026-10-31)
- CWE
- CWE-347
- 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://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8
- https://github.com/dexidp/dex/releases/tag/v2.27.0
- https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.md