CVE-2026-55075

Coder vulnerable to OIDC account takeover via email-based user matching and email_verified bypass

State
Published
Severity
7.4 High
Published
Jul 7, 2026
Updated
Jul 8, 2026
Reserved
Jun 16, 2026

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Description

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, two flaws in Coder's OIDC login chained into account takeover. Email-based user matching fell back to linking by email without checking for an existing link to a different IdP subject and the `email_verified` claim was only enforced when present as a boolean `false` so an absent or non-boolean claim was treated as verified. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 restricts the email fallback to first-time and legacy linking and defaults `email_verified` to false when the claim is absent or of an unexpected type. As a workaround, configure the OIDC provider to disallow self-registration or to require email verification before issuing tokens.

Scores

CVSSScoreVectorSource
3.17.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NGitHub_M

Weaknesses

  • CWE-287 Improper Authentication
  • CWE-289 Authentication Bypass by Alternate Name

Affected Products

ProductVersions
codercoder
  • >= 2.34.0, < 2.34.2Affected
  • >= 2.33.0, < 2.33.8Affected
  • >= 2.30.0, < 2.32.7Affected
  • < 2.29.17Affected

References

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