CVE-2026-55076

Vulnerability 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.

CVSS Score

Affected Products

Related Weaknesses (CWE)

References

• https://github.com/coder/coder/pull/25712Issue TrackingPatch
• https://github.com/coder/coder/pull/25713Issue TrackingPatch
• https://github.com/coder/coder/releases/tag/v2.29.17Release Notes
• https://github.com/coder/coder/releases/tag/v2.32.7Release Notes
• https://github.com/coder/coder/releases/tag/v2.33.8Release Notes
• https://github.com/coder/coder/releases/tag/v2.34.2Release Notes
• https://github.com/coder/coder/security/advisories/GHSA-75vm-6w67-gwvpPatchVendor Advisory