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CVE PROGRAM SOURCE RECORD7.4 High

CVE-2026-55076

Coder's OIDC email_verified type coercion bypass enables account takeover via unverified email linking

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Status
Published
Published
Updated
Assigning organization
GitHub_M

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, Coder's OIDC callback checked `email_verified` with a direct Go `bool` type assertion. When an IdP returned the claim as a non-boolean (for example the string `"false"`) or omitted it, the assertion failed open and the email was treated as verified. Combined with an unconditional email-based account fallback, this enabled account takeover. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 coerces `email_verified` across bool, string and numeric types (fail-closed) and blocks the email fallback when the matched user already has a different linked IdP subject. As a workaround, ensure the IdP returns `email_verified` as a native JSON boolean. The email-fallback linking issue has no configuration workaround; upgrading is required.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

coder coder

  • >= 2.34.0, < 2.34.2affected
  • >= 2.33.0, < 2.33.8affected
  • >= 2.30.0, < 2.32.7affected
  • < 2.29.17affected

References