Description
Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.17.0 and prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `POST /api/v2/files` converts zip uploads to tar in memory via `CreateTarFromZip`, which enforced a per-entry size limit but no aggregate limit on total decompressed output, writing to an unbounded in-memory buffer. Exploitation requires authenticated file-upload access and the impact is limited to availability (denial of service). The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 adds a metadata preflight check that sums projected entry sizes and a streaming writer that enforces the aggregate limit during decompression. As a workaround, restrict file-upload permissions to trusted users or place a reverse proxy with request-body size limits in front of `coderd`.
Severity (CVSS)
| Base score | 6.5 |
|---|---|
| Severity | Medium |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Provided by | CNA |
Weaknesses
- CWE-409 — CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
- CWE-770 — CWE-770: Allocation of Resources Without Limits or Throttling
Affected products
| Vendor | Product | Versions |
|---|---|---|
| coder | coder | >= 2.34.0, < 2.34.2; >= 2.33.0, < 2.33.8; >= 2.30.0, < 2.32.7; >= 2.17.0, < 2.29.17 |
References
- https://github.com/coder/coder/security/advisories/GHSA-2mg2-p7r7-g27f (x_refsource_CONFIRM)
- https://github.com/coder/coder/pull/25877 (x_refsource_MISC)
- https://github.com/coder/coder/releases/tag/v2.29.17 (x_refsource_MISC)
- https://github.com/coder/coder/releases/tag/v2.32.7 (x_refsource_MISC)
- https://github.com/coder/coder/releases/tag/v2.33.8 (x_refsource_MISC)
- https://github.com/coder/coder/releases/tag/v2.34.2 (x_refsource_MISC)
Generated from the official CVE List on 08 Jul 2026 07:00 UTC.