CVE-2026-55075
published 2026-07-07CVE-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…
PriorityP347high7.4CVSS 3.1
AVNACHPRNUINSUCHIHAN
EPSS
0.48%
40.5th percentile
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.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| coder | coder | < 2.29.17 | 2.29.17 |
| coder | coder | — | — |
| coder | coder | — | — |
| coder | coder | — | — |
| coder | coder | >= 2.30.0 < 2.32.7 | 2.32.7 |
| coder | coder | >= 2.33.0 < 2.33.8 | 2.33.8 |
| coder | coder | >= 2.34.0 < 2.34.2 | 2.34.2 |
| github.com | coder_coder_v2 | >= 0 < 2.29.17 | 2.29.17 |
| github.com | coder_coder_v2 | >= 2.30.0 < 2.32.7 | 2.32.7 |
| github.com | coder_coder_v2 | >= 2.33.0 < 2.33.8 | 2.33.8 |
| github.com | coder_coder_v2 | >= 2.34.0 < 2.34.2 | 2.34.2 |
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VulDB
Coder up to 2.29.16/2.32.6/2.33.7/2.34.1 OIDC Login improper authentication
vuldb·2026-07-08·CVSS 7.4
CVE-2026-55075 [HIGH] Coder up to 2.29.16/2.32.6/2.33.7/2.34.1 OIDC Login improper authentication
A vulnerability, which was classified as critical, has been found in Coder up to 2.29.16/2.32.6/2.33.7/2.34.1. The impacted element is an unknown function of the component OIDC Login. Performing a manipulation results in improper authentication.
This vulnerability was named CVE-2026-55075. The attack may be initiated remotely. There is no available exploit.
GHSA
Coder vulnerable to OIDC account takeover via email-based user matching and email_verified bypass
ghsa·2026-07-06
CVE-2026-55075 [HIGH] CWE-287 Coder vulnerable to OIDC account takeover via email-based user matching and email_verified bypass
Coder vulnerable to OIDC account takeover via email-based user matching and email_verified bypass
### Summary
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.
### Impact
An attacker who could authenticate at the configured OIDC provider with an email matching a victim's Coder account could log in as that victim and gain full access to their workspaces, templates and resources. This required OIDC authentication, attacker control of a matching email at the IdP and a victim account not yet linked to a different IdP s
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/coder/coder/pull/25712https://github.com/coder/coder/pull/25713https://github.com/coder/coder/releases/tag/v2.29.17https://github.com/coder/coder/releases/tag/v2.32.7https://github.com/coder/coder/releases/tag/v2.33.8https://github.com/coder/coder/releases/tag/v2.34.2https://github.com/coder/coder/security/advisories/GHSA-9r87-mvcw-x35f
2026-07-07
Published