---
cve: "CVE-2026-55429"
severity: "HIGH"
cvss: 8.7
epss: "29%"
vendor: "coder"
kev: false
exploited: false
published: "2026-07-08 00:16:33"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-09T05:21:04+02:00"
---

# CVE-2026-55429

> 8.7 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, `UpsertWorkspaceApp` overwrites an existing app's `agent_id` on a primary-key conflict and `insertAgentApp` accepts the app ID from the provisioner's `CompleteJob` payload without verifying it belongs to the workspace being built. `CompleteJob` runs under `dbauthz.AsProvisionerd` so the authorization layer does not block the cross-workspace upsert. Exploitation requires elevated access as a template author or external provisioner operator. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 verifies that any existing `workspace_apps` row matching the supplied ID belongs to the workspace being built and rejects cross-workspace agent reassignment. No known workarounds are available.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| 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-9rjw-3gwp-f59v>
- <https://github.com/coder/coder/pull/26103>
- <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-2026-55429) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_