CVEvulnerability
CVE-2020-26290
9.6 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2020-12-28
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.3 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- CVSS 3.1 ([email protected])
- 9.6 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-347
Description
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).
Affected configurations
• linuxfoundation dex (< 2.27.0)
Related
Weakness · CWE (1)
- CWE-347 Improper Verification of Cryptographic Signature weakness
References
- https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8 Patch, Third Party Advisory
- https://github.com/dexidp/dex/releases/tag/v2.27.0 Third Party Advisory
- https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5 Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md Not Applicable, Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.md Not Applicable, Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.md Not Applicable, Third Party Advisory
- https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7 Not Applicable, Third Party Advisory
- https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ Not Applicable, Third Party Advisory
- https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8 Patch, Third Party Advisory
- https://github.com/dexidp/dex/releases/tag/v2.27.0 Third Party Advisory
- https://github.com/dexidp/dex/security/advisories/GHSA-m9hp-7r99-94h5 Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md Not Applicable, Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.md Not Applicable, Third Party Advisory
- https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.md Not Applicable, Third Party Advisory
- https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7 Not Applicable, Third Party Advisory
- https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ Not Applicable, Third Party Advisory