CVE-2026-55078

6.5 MEDIUM
Published: July 07, 2026 Modified: July 07, 2026
View on NVD

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`.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/coder/coder/pull/25877
Source: security-advisories@github.com
https://github.com/coder/coder/releases/tag/v2.29.17
Source: security-advisories@github.com
https://github.com/coder/coder/releases/tag/v2.32.7
Source: security-advisories@github.com
https://github.com/coder/coder/releases/tag/v2.33.8
Source: security-advisories@github.com
https://github.com/coder/coder/releases/tag/v2.34.2
Source: security-advisories@github.com

6 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.5 / 10.0
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)