CVE-2020-26290: Critical security issues in XML encoding in Dex

First published: Mon Dec 28 2020(Updated: )

### Impact The following vulnerabilities have been disclosed, which impact users leveraging the SAML connector: Signature Validation Bypass (CVE-2020-15216): https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-q547-gmf8-8jr7 `encoding/xml` instabilities: - [Element namespace prefix instability (CVE-2020-29511)](https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-elements.md) - [Attribute namespace prefix instability (CVE-2020-29509)](https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md) - [Directive comment instability (CVE-2020-29510)](https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-directives.md) ### Patches Immediately update to [Dex v2.27.0](https://github.com/dexidp/dex/releases/tag/v2.27.0). ### Workarounds There are no known workarounds.

Credit: security-advisories@github.com security-advisories@github.com

Affected Software	Affected Version	How to fix
Linuxfoundation Dex	<2.27.0

Remedy

https://github.com/dexidp/dex/commit/324b1c886b407594196113a3dbddebe38eecd4e8

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