---
cve: "CVE-2026-55075"
severity: "HIGH"
cvss: 7.4
epss: "29%"
vendor: "coder"
kev: false
exploited: false
published: "2026-07-07 22:16:53"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-09T12:26:01+02:00"
---

# CVE-2026-55075

> 7.4 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 77253bfc55665027a374a5d2fb70f4ff74410326 (Commit)
- 0374b00b63bc5043a507194f284ef298e0ea3b52 (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55075) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_