CVE-2026-55075

HIGH

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

Title source: cna
STIX 2.1

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.

References (7)

Core 7
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/coder/coder/pull/25712
X_Refsource_Misc x_refsource_misc
https://github.com/coder/coder/pull/25713
X_Refsource_Misc x_refsource_misc
https://github.com/coder/coder/releases/tag/v2.29.17
X_Refsource_Misc x_refsource_misc
https://github.com/coder/coder/releases/tag/v2.32.7
X_Refsource_Misc x_refsource_misc
https://github.com/coder/coder/releases/tag/v2.33.8
X_Refsource_Misc x_refsource_misc
https://github.com/coder/coder/releases/tag/v2.34.2

Scores

CVSS v3 7.4
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Details

CWE
CWE-287 CWE-289
Status published
Products (4)
coder/coder < 2.29.17
coder/coder >= 2.30.0, < 2.32.7
coder/coder >= 2.33.0, < 2.33.8
coder/coder >= 2.34.0, < 2.34.2
Published Jul 07, 2026
Tracked Since Jul 08, 2026