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Vulnerability record · CVE-2026-55075 · published 7 July 2026

CVE-2026-55075: Coder improper authentication vulnerability

Coder · Coder

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.

7.4 CVSS 3.1 High EPSS 0.48% · top 61.2% CWE-287 · Improper authenticationCWE-289 · CWE-289
7.4CVSS 3.1 base score
0.48%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
8 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/coder/coder/pull/25712 Issue TrackingPatch
https://github.com/coder/coder/pull/25713 Issue TrackingPatch
https://github.com/coder/coder/releases/tag/v2.29.17 Release Notes
https://github.com/coder/coder/releases/tag/v2.32.7 Release Notes
https://github.com/coder/coder/releases/tag/v2.33.8 Release Notes
https://github.com/coder/coder/releases/tag/v2.34.2 Release Notes
https://github.com/coder/coder/security/advisories/GHSA-9r87-mvcw-x35f PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-55075), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.