Vulnerability Details CVE-2026-55078
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`.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 44.4%
CVSS Severity
CVSS v3 Score 6.5
Products affected by CVE-2026-55078
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cpe:2.3:a:coder:coder:2.17.0
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cpe:2.3:a:coder:coder:2.17.2
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cpe:2.3:a:coder:coder:2.17.3
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cpe:2.3:a:coder:coder:2.18.0
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cpe:2.3:a:coder:coder:2.18.1
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cpe:2.3:a:coder:coder:2.18.2
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cpe:2.3:a:coder:coder:2.18.3
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cpe:2.3:a:coder:coder:2.18.4
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cpe:2.3:a:coder:coder:2.18.5
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cpe:2.3:a:coder:coder:2.19.0
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cpe:2.3:a:coder:coder:2.19.1
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cpe:2.3:a:coder:coder:2.19.2
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cpe:2.3:a:coder:coder:2.19.3
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cpe:2.3:a:coder:coder:2.20.0
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cpe:2.3:a:coder:coder:2.20.1
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cpe:2.3:a:coder:coder:2.20.2
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cpe:2.3:a:coder:coder:2.20.3
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cpe:2.3:a:coder:coder:2.21.0
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cpe:2.3:a:coder:coder:2.21.1
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cpe:2.3:a:coder:coder:2.21.2
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cpe:2.3:a:coder:coder:2.21.3
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cpe:2.3:a:coder:coder:2.22
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cpe:2.3:a:coder:coder:2.22.0
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cpe:2.3:a:coder:coder:2.22.1
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cpe:2.3:a:coder:coder:2.23.0
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cpe:2.3:a:coder:coder:2.23.1
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cpe:2.3:a:coder:coder:2.23.2
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cpe:2.3:a:coder:coder:2.23.3
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cpe:2.3:a:coder:coder:2.23.4
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cpe:2.3:a:coder:coder:2.23.5
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cpe:2.3:a:coder:coder:2.24.0
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cpe:2.3:a:coder:coder:2.24.1
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cpe:2.3:a:coder:coder:2.24.2
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cpe:2.3:a:coder:coder:2.24.3
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cpe:2.3:a:coder:coder:2.24.4
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cpe:2.3:a:coder:coder:2.25.0
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cpe:2.3:a:coder:coder:2.25.1
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cpe:2.3:a:coder:coder:2.25.2
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cpe:2.3:a:coder:coder:2.25.3
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cpe:2.3:a:coder:coder:2.26.0
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cpe:2.3:a:coder:coder:2.26.1
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cpe:2.3:a:coder:coder:2.26.2
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cpe:2.3:a:coder:coder:2.26.3
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cpe:2.3:a:coder:coder:2.26.4
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cpe:2.3:a:coder:coder:2.26.5
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cpe:2.3:a:coder:coder:2.26.6
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cpe:2.3:a:coder:coder:2.27.0
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cpe:2.3:a:coder:coder:2.27.1
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cpe:2.3:a:coder:coder:2.27.10
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cpe:2.3:a:coder:coder:2.27.11
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cpe:2.3:a:coder:coder:2.27.2
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cpe:2.3:a:coder:coder:2.27.3
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cpe:2.3:a:coder:coder:2.27.4
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cpe:2.3:a:coder:coder:2.27.5
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cpe:2.3:a:coder:coder:2.27.6
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cpe:2.3:a:coder:coder:2.27.7
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cpe:2.3:a:coder:coder:2.27.8
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cpe:2.3:a:coder:coder:2.27.9
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cpe:2.3:a:coder:coder:2.28.0
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cpe:2.3:a:coder:coder:2.28.1
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cpe:2.3:a:coder:coder:2.28.2
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cpe:2.3:a:coder:coder:2.28.3
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cpe:2.3:a:coder:coder:2.28.4
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cpe:2.3:a:coder:coder:2.28.5
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cpe:2.3:a:coder:coder:2.28.6
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cpe:2.3:a:coder:coder:2.28.7
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cpe:2.3:a:coder:coder:2.28.8
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cpe:2.3:a:coder:coder:2.28.9
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cpe:2.3:a:coder:coder:2.29.0
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cpe:2.3:a:coder:coder:2.29.1
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cpe:2.3:a:coder:coder:2.29.10
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cpe:2.3:a:coder:coder:2.29.11
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cpe:2.3:a:coder:coder:2.29.12
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cpe:2.3:a:coder:coder:2.29.13
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cpe:2.3:a:coder:coder:2.29.14
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cpe:2.3:a:coder:coder:2.29.15
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cpe:2.3:a:coder:coder:2.29.16
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cpe:2.3:a:coder:coder:2.29.2
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cpe:2.3:a:coder:coder:2.29.3
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cpe:2.3:a:coder:coder:2.29.4
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cpe:2.3:a:coder:coder:2.29.5
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cpe:2.3:a:coder:coder:2.29.6
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cpe:2.3:a:coder:coder:2.29.7
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cpe:2.3:a:coder:coder:2.29.8
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cpe:2.3:a:coder:coder:2.29.9
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cpe:2.3:a:coder:coder:2.30.0
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cpe:2.3:a:coder:coder:2.30.1
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cpe:2.3:a:coder:coder:2.30.2
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cpe:2.3:a:coder:coder:2.30.3
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cpe:2.3:a:coder:coder:2.30.4
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cpe:2.3:a:coder:coder:2.30.5
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cpe:2.3:a:coder:coder:2.30.6
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cpe:2.3:a:coder:coder:2.30.7
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cpe:2.3:a:coder:coder:2.30.8
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cpe:2.3:a:coder:coder:2.30.9
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cpe:2.3:a:coder:coder:2.31.0
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cpe:2.3:a:coder:coder:2.31.1
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cpe:2.3:a:coder:coder:2.31.10
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cpe:2.3:a:coder:coder:2.31.11
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cpe:2.3:a:coder:coder:2.31.12
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cpe:2.3:a:coder:coder:2.31.13
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cpe:2.3:a:coder:coder:2.31.14
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cpe:2.3:a:coder:coder:2.31.2
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cpe:2.3:a:coder:coder:2.31.3
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cpe:2.3:a:coder:coder:2.31.4
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cpe:2.3:a:coder:coder:2.31.5
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cpe:2.3:a:coder:coder:2.31.6
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cpe:2.3:a:coder:coder:2.31.7
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cpe:2.3:a:coder:coder:2.31.8
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cpe:2.3:a:coder:coder:2.31.9
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cpe:2.3:a:coder:coder:2.32.0
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cpe:2.3:a:coder:coder:2.32.1
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cpe:2.3:a:coder:coder:2.32.2
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cpe:2.3:a:coder:coder:2.32.3
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cpe:2.3:a:coder:coder:2.32.4
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cpe:2.3:a:coder:coder:2.32.5
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cpe:2.3:a:coder:coder:2.32.6
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cpe:2.3:a:coder:coder:2.33.0
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cpe:2.3:a:coder:coder:2.33.1
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cpe:2.3:a:coder:coder:2.33.2
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cpe:2.3:a:coder:coder:2.33.3
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cpe:2.3:a:coder:coder:2.33.4
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cpe:2.3:a:coder:coder:2.33.5
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cpe:2.3:a:coder:coder:2.33.6
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cpe:2.3:a:coder:coder:2.33.7
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cpe:2.3:a:coder:coder:2.34.0
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cpe:2.3:a:coder:coder:2.34.1