CVE-2026-55075

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.

• github.comhttps://github.com/coder/coder/pull/25712
• github.comhttps://github.com/coder/coder/pull/25713
• github.comhttps://github.com/coder/coder/releases/tag/v2.29.17
• github.comhttps://github.com/coder/coder/releases/tag/v2.32.7
• github.comhttps://github.com/coder/coder/releases/tag/v2.33.8
• github.comhttps://github.com/coder/coder/releases/tag/v2.34.2
• github.comhttps://github.com/coder/coder/security/advisories/GHSA-9r87-mvcw-x35f