Authentication Bypass by Alternate Name Affecting github.com/coder/coder/coderd/database package, versions >=0.0.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMCODERCODERCODERDDATABASE-17869424
- published6 Jul 2026
- disclosed6 Jul 2026
- creditUnknown
Introduced: 6 Jul 2026
CVE-2026-55075 (opens in a new tab)How to fix?
There is no fixed version for github.com/coder/coder/coderd/database.
Overview
Affected versions of this package are vulnerable to Authentication Bypass by Alternate Name via improper handling of OIDC authentication and the email_verified claim. An attacker can gain unauthorized access to another user's account by authenticating with an email address matching the victim's account and exploiting the fallback linking mechanism. This is only exploitable if the attacker controls an email address at the IdP that matches a victim account and the victim account is not yet linked to a different IdP subject.
Workaround
This vulnerability can be mitigated by configuring the OIDC provider to disallow self-registration or to require email verification before issuing tokens.