CVE-2026-55432
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, the `CreateSubAgent` RPC did not validate a requested app sharing level against the template's `MaxPortSharingLevel` before persisting workspace apps, letting a workspace owner exceed the administrator's configured maximum. Exploitation requires the ability to register sub-agent apps in a workspace the attacker controls. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2clamps the sub-agent app sharing level to the template's `MaxPortSharingLevel`. As a workaround, disable wildcard app hostnames (`CODER_WILDCARD_ACCESS_URL`) to block subdomain-based app routing.
How to fix
- coder coder2.29.17, 2.32.7, 2.33.8, 2.34.2 or later
- github.com/coder/coder/v22.34.2, 2.33.8, 2.32.7, 2.29.17 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| coder coder | v < 2.29.17, 2.30.0 ≤ v < 2.32.7, 2.33.0 ≤ v < 2.33.8, 2.34.0 ≤ v < 2.34.2 | 2.29.17, 2.32.7, 2.33.8, 2.34.2 |
| github.com/coder/coder/v2Go | 2.34.0 ≤ v < 2.34.2, 2.33.0 ≤ v < 2.33.8, 2.30.0 ≤ v < 2.32.7, v < 2.29.17 | 2.34.2, 2.33.8, 2.32.7, 2.29.17 |
| github.com/coder/coderGo | No range specified | — |
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